用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 %g%#=a;]q
插入排序: 9Dy/-%Ut9
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package org.rut.util.algorithm.support; ^'aMp}3iu
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import org.rut.util.algorithm.SortUtil; :+|os"
/** nc%ly *
* @author treeroot >=U n=Q%
* @since 2006-2-2 B1a&'WX?
* @version 1.0 [z`m`9Aq
*/ DvvjIYB~
public class InsertSort implements SortUtil.Sort{ Ot_xeg;7
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/* (non-Javadoc) Flzl,3rW4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lTpmoDa%
*/ QK%6Ncv
public void sort(int[] data) { ?I.<mdhN#t
int temp; I-
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for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); O486:tF
} D+vHl}
} CzZmC]5
} I 0}+}{M:
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} !jxz2Q
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冒泡排序:
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package org.rut.util.algorithm.support; Pz1[ b$%
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import org.rut.util.algorithm.SortUtil; PO[
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/** skn`Q>a
* @author treeroot w;(`!^xv
* @since 2006-2-2 L.z`>1
* @version 1.0 \{ G1d"n
*/ 4W9#z~'
public class BubbleSort implements SortUtil.Sort{ ;Qc_Tf=,
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/* (non-Javadoc) nx >PZb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "[(I*
*/ 5/v@VUzH
public void sort(int[] data) { #eT{?_wM
int temp; 'o2x7~C@
for(int i=0;i for(int j=data.length-1;j>i;j--){ ~',<7eW
if(data[j] SortUtil.swap(data,j,j-1); Fss7xP'
} gekW&tRie
} yU~OfwQ
} q8;WHfGf
} <=*xwI&q
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} z Uqt^_
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选择排序: qsUlfv9L6
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package org.rut.util.algorithm.support; dD3I. ?DY
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import org.rut.util.algorithm.SortUtil; z&o"K\y\
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/** H/p<lp
* @author treeroot \5$N>
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* @since 2006-2-2 [g_Cg=J
* @version 1.0 `}KK@(Y
*/ w<<G}4~u|
public class SelectionSort implements SortUtil.Sort { 9qe6hF/29
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/* N?H;fK4v
* (non-Javadoc)
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* +! 6C^G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ sAIL+O
public void sort(int[] data) { +.Kmpw4
int temp; _^'fp
for (int i = 0; i < data.length; i++) { $Xw .iN]g
int lowIndex = i; ]BU,*YaB
for (int j = data.length - 1; j > i; j--) { <`sVu
if (data[j] < data[lowIndex]) { jYet!l
lowIndex = j; P. P3/,
} `!HGM>
} L=Q-r[
SortUtil.swap(data,i,lowIndex); z]> 0A
} ,ijgq EN
} W$@q
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} _JA.~edqM
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Shell排序: gM20n^
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package org.rut.util.algorithm.support; W|3XD-v@
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import org.rut.util.algorithm.SortUtil; '8~7Ru\KyX
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/** 3uCC_Am
* @author treeroot ZGa>^k[:
* @since 2006-2-2 \pB"R$YZ6
* @version 1.0 Dg/&m*Yl
*/ .e5GJAW~9
public class ShellSort implements SortUtil.Sort{ u4NMJnX
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/* (non-Javadoc) b5
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "g\
*/ J[;c}
public void sort(int[] data) { FGBPhH% (8
for(int i=data.length/2;i>2;i/=2){ gk~.u
for(int j=0;j insertSort(data,j,i); V^=z\wBZ
} ts3%cRN r
} 5UR$Pn2a2
insertSort(data,0,1); JQ'NFl9<
} dfGdY"&
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/** EkM? Rs
* @param data q(e&{pbM)
* @param j C<2vuZD
* @param i X^#48*"a
*/ R>Fie5?
private void insertSort(int[] data, int start, int inc) { Q2PY(
#
int temp; %xf6U>T
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); oJR0sbikP
} }8p;w T!
} BD[XP`[{
} (1fE^KF@f
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} JJ q= {;
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快速排序: &@c=$+#C
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package org.rut.util.algorithm.support; W+&ZYN'E
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import org.rut.util.algorithm.SortUtil; =U!'v X d
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/** xZjD(e'
* @author treeroot {Lb NKjn
* @since 2006-2-2 fzRzkn:=
* @version 1.0 tQbDP!,A*=
*/ ?C//UN;
public class QuickSort implements SortUtil.Sort{ ||cG/I&,
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/* (non-Javadoc) .t4IR
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z)=D&\HX
*/ /OK.n3Tt
public void sort(int[] data) { R:x4j#(
quickSort(data,0,data.length-1); *Eu
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} ,<%Y.x%4z[
private void quickSort(int[] data,int i,int j){ `#A&v
int pivotIndex=(i+j)/2; 3zp)!QJi
file://swap `UMv#-Y8
SortUtil.swap(data,pivotIndex,j); g4&zBn
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int k=partition(data,i-1,j,data[j]); 1j# ~:=I
SortUtil.swap(data,k,j); Lg[*P8wE
if((k-i)>1) quickSort(data,i,k-1); ..3TB=Z#
if((j-k)>1) quickSort(data,k+1,j); #IA[erf:
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} NwoBM6 #
/** ++F #Z(p
* @param data 7m{ 'V`F
* @param i 2[LT!TT
* @param j [#$ -kd~
* @return THWT\3~,
*/ Xz4!#,z/
private int partition(int[] data, int l, int r,int pivot) { W*e6F?G
do{ ooreforr
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); U")~bU
SortUtil.swap(data,l,r); N?U;G*G
} 4~hd{8
while(l SortUtil.swap(data,l,r); ~;QO`I=0P
return l; PQ<""_S||
} 1mgLH
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} F:x" RbbF
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改进后的快速排序: o"R[#E&Yx
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package org.rut.util.algorithm.support; XU5/7
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import org.rut.util.algorithm.SortUtil; ~t n*y4uK
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/** d3_aFsQ
* @author treeroot 9e^[5D=L
* @since 2006-2-2 [!,&A{.!
* @version 1.0 c<wsWs 4V
*/ r#JE7uneT
public class ImprovedQuickSort implements SortUtil.Sort { )9 5&-Hs
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private static int MAX_STACK_SIZE=4096; 8]]uk=P
private static int THRESHOLD=10; "n,">
/* (non-Javadoc) QUVwO
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q6f+tdg=
*/ 3haYb`
public void sort(int[] data) { W~aVwO'(
int[] stack=new int[MAX_STACK_SIZE]; ^](sCE7
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int top=-1; /T]2ZX>
int pivot; H ifKa/}P8
int pivotIndex,l,r; / @X!
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stack[++top]=0; 5'd$TC
stack[++top]=data.length-1; 0=# :x()e
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while(top>0){ rE;*MqYt&
int j=stack[top--]; yhJH3<
int i=stack[top--]; v{Al>v}}n
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pivotIndex=(i+j)/2; ?>cx;"xF
pivot=data[pivotIndex]; LdwWB
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SortUtil.swap(data,pivotIndex,j); %%)"W
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file://partition t, #7F$t
l=i-1; jOa .h
r=j; ^=.R#zrc
do{ D+P(
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); F{0Z
SortUtil.swap(data,l,r); BaZ$p O^
} 'FgBYy/
while(l SortUtil.swap(data,l,r); _t||v
SortUtil.swap(data,l,j); X0Y1I}gD
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if((l-i)>THRESHOLD){ ,dhJ\cQ~
stack[++top]=i; L15?\|':Y
stack[++top]=l-1; nICc}U?k
} B>rz<bPT
if((j-l)>THRESHOLD){ r@ujE,D=k
stack[++top]=l+1; X0Zqx1
stack[++top]=j; U(P^-J<n1
} FkY}6
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} Q^prHn*@
file://new InsertSort().sort(data); aUa.!,_dh
insertSort(data); XLb
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} $nF|n+m
/** < aJl
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* @param data qq.M]?Z
*/ S[J eW
private void insertSort(int[] data) { 3u#bx1
int temp; U$v|c%6
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); `-W.uOZ0
} SK
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} `)%z k W
} :+NZW9_
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} @&?E3?5ll
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归并排序: u^|c_5J(
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package org.rut.util.algorithm.support; h?R{5?RxK
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import org.rut.util.algorithm.SortUtil; :dq.@:+<R
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/** J{;XNf =
* @author treeroot KBE3q)
* @since 2006-2-2 g%Bh-O9\
* @version 1.0 ve($l"T
*/ ${m;x: '
public class MergeSort implements SortUtil.Sort{ V5:ad
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/* (non-Javadoc) OL]P(HRm]~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EQI9J#;+
*/ 01=nS?
public void sort(int[] data) { M.fAFL
int[] temp=new int[data.length]; -!;2?6R9{
mergeSort(data,temp,0,data.length-1); ;\j7jz^uC
} zU7co.G
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private void mergeSort(int[] data,int[] temp,int l,int r){ Zc 9@G-
int mid=(l+r)/2; K&ZN!VN/p
if(l==r) return ; } I>6 8dS[
mergeSort(data,temp,l,mid); !C\$=\$
mergeSort(data,temp,mid+1,r); 9d&@;&al
for(int i=l;i<=r;i++){ ^POHQQ
temp=data; V %h,JA
} p0*qv"lA
int i1=l; R !g'zS'
int i2=mid+1; m%zo? e
for(int cur=l;cur<=r;cur++){ 3LGX ^J<f
if(i1==mid+1)
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data[cur]=temp[i2++]; G0#<SJ,)
else if(i2>r) :I_p4S.)
data[cur]=temp[i1++]; Vu.VH([b]Q
else if(temp[i1] data[cur]=temp[i1++]; &O
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else OQW%nF9~
data[cur]=temp[i2++]; Kzw br?&z
} P5Lb)9_Jw
} @k=UB&?I
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} &!P' M
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改进后的归并排序: 6/Iq@BZ&
0N;~(Vt2
package org.rut.util.algorithm.support; Z(j"\d!y
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import org.rut.util.algorithm.SortUtil; }NjZfBQW`
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/** nTsKJX%\
* @author treeroot Pi+pQFz5
* @since 2006-2-2 %k%%3L,
* @version 1.0 umT *
*/ 9|D*}OY>
public class ImprovedMergeSort implements SortUtil.Sort { e5RF6roxO
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private static final int THRESHOLD = 10; /< k&[
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/* O22Q
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* (non-Javadoc) e,kxg^
* ZnKjU ]m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IG+g7kDCY
*/ JBhM*-t(M1
public void sort(int[] data) { k5M5bH',
int[] temp=new int[data.length]; vtq$@#?~ b
mergeSort(data,temp,0,data.length-1); xU/7}='T
} |kY}G3/
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private void mergeSort(int[] data, int[] temp, int l, int r) { @An}
int i, j, k; g.Tc>?~
int mid = (l + r) / 2; (Bq^
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if (l == r) l1bkhA b
return; Y~xo=v(
if ((mid - l) >= THRESHOLD) lArKfs/
mergeSort(data, temp, l, mid); +7\d78U
else '-U&S
insertSort(data, l, mid - l + 1); ]p8zT|bv
if ((r - mid) > THRESHOLD) *
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mergeSort(data, temp, mid + 1, r); .k:heN2-x
else ">._&8KkE0
insertSort(data, mid + 1, r - mid); lihIPMU
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for (i = l; i <= mid; i++) { d-3.7nJ:
temp = data; /#WvC;B
} V7b;qC'
for (j = 1; j <= r - mid; j++) { Rk,'ujc
temp[r - j + 1] = data[j + mid]; beaSvhPU
} %afN&T
int a = temp[l]; hkb&]XWi[
int b = temp[r]; 9tX+n{i
for (i = l, j = r, k = l; k <= r; k++) { Zg$S% 1(Q
if (a < b) { i;rcgd
data[k] = temp[i++]; H;R~d%!b
a = temp; FnKC|X
} else { Fw\g\
data[k] = temp[j--]; \TZSn1isZX
b = temp[j]; e)= "Fq!
} ZNVrja*
} Sn
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} b'``0OB )
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/** 7Db}bDU1
|
* @param data Jd^Lnp6?
* @param l T|8:_4/l
* @param i @@j:z;^|
*/ "OwK-
private void insertSort(int[] data, int start, int len) { ]5K+W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s+~GQcj<T
} )=#e*1!b
} Esu{c9,
} j]FK.G'
} "fr{:'HX
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堆排序: h%U}Y5Ps~
3. @LAF
package org.rut.util.algorithm.support; $ay!'MK0d
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import org.rut.util.algorithm.SortUtil; &?1O D5
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/** dB6['z)2
* @author treeroot U?an\rv
* @since 2006-2-2 r<'DS9m
* @version 1.0 |p!($
*/ m}u)C&2>
public class HeapSort implements SortUtil.Sort{ X;H\u6-|>6
NXQ=8o9,9
/* (non-Javadoc) !zvjgDlZv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PtYG%/s
*/ IITUM)
public void sort(int[] data) { 41R6V>e@9J
MaxHeap h=new MaxHeap(); ?"*JV1 9
h.init(data); 9/!1J
for(int i=0;i h.remove(); <#J5.I 1
System.arraycopy(h.queue,1,data,0,data.length); $|xSM2
} n\)1Bz
<}:` Y"
private static class MaxHeap{ z3]W #
}tw+8YWkz
void init(int[] data){ gROK4'j6y
this.queue=new int[data.length+1]; 0^R, d M
for(int i=0;i queue[++size]=data; zz[fkH3
fixUp(size); B2oKvgw
} 'da
'WZG
} O!%T<2i3
)
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private int size=0; &&m3E=K!^
d|oO2yzWv
private int[] queue; )l$}plT4
T\n6^@.>
public int get() { E_En"r)y
return queue[1]; S
:8
} 70GBf"
'AX5V-t
public void remove() { 8 eK 8-R$
SortUtil.swap(queue,1,size--); ~5`oNa
fixDown(1); 5?F5xiW
} t[J=8rhER
file://fixdown oz>2P.7
private void fixDown(int k) { Q&N#q53
int j; :IU7dpwDl
while ((j = k << 1) <= size) { #gqh0 27
if (j < size %26amp;%26amp; queue[j] j++; m0As t<u
if (queue[k]>queue[j]) file://不用交换 j{YYG|
break; z4:<?K
SortUtil.swap(queue,j,k); R2n
2mQ <
k = j; g\fj6
} \7i_2|w
} ;<N:! $p
private void fixUp(int k) { ?WHf%Ie2(
while (k > 1) { # H
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int j = k >> 1; cLl~4jL
if (queue[j]>queue[k]) u*v<