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[JAVA]用Java实现的各种排序

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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。 |>v8yS5  
插入排序: f-5}`)`.+  
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package org.rut.util.algorithm.support; 5;[h&jH  
+nKf ^rG  
import org.rut.util.algorithm.SortUtil; 28,g'k!  
/** (i@B+c  
* @author treeroot >U6 2vX"  
* @since 2006-2-2 9$=o({  
* @version 1.0 E>&oe&`o'  
*/ ~+&Z4CYb  
public class InsertSort implements SortUtil.Sort{ aMO+ y91Y(  
>mp" =Y  
/* (non-Javadoc) psM&r  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _8s1Wh G  
*/ @YI- @  
public void sort(int[] data) { qVr?st  
int temp; FQO>%=&4  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Y/`*t(/5  
} #RTiWD[o  
} x`Ik747^v  
} vx4Jk]h+=L  
1J[|Ow  
} P7y.:%DGD0  
A>Xt 5vk+  
冒泡排序: YnwP\Arfq  
S)z5=N(Xz  
package org.rut.util.algorithm.support; F:cenIaBF  
&BkdC,o  
import org.rut.util.algorithm.SortUtil; O_|p{65  
@WO>F G3  
/** [ |dQZ  
* @author treeroot 9p%8VDF=  
* @since 2006-2-2 hgI;^ia  
* @version 1.0 {U7A&e0eW  
*/ O`2hTY\  
public class BubbleSort implements SortUtil.Sort{ t.6gyrV7><  
4<l&cP  
/* (non-Javadoc) IWP[?U=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YN($rAkL  
*/ +EP=uV9t  
public void sort(int[] data) { Z*M-PaU}  
int temp; { , zg  
for(int i=0;i for(int j=data.length-1;j>i;j--){ FX:'38-fk  
if(data[j] SortUtil.swap(data,j,j-1); v@;!fBUt  
} i~;Yrc%AEX  
} [y1 x`WOk9  
} X0Z r?$q  
} 1,(uRS#bk  
_5SA(0D#9  
} B4ky%gF4  
X7{ h/^  
选择排序: YDdY'd`*  
P4.snRQ  
package org.rut.util.algorithm.support; t9+ME|  
r-IG.ym3  
import org.rut.util.algorithm.SortUtil; xH/Pw?^  
[SA$d`B/  
/** \ws^L, h  
* @author treeroot _.G p}0a  
* @since 2006-2-2 =EdLffU[J  
* @version 1.0 n 2m!a0;  
*/ eK'ztqQ  
public class SelectionSort implements SortUtil.Sort { (N`x  
fY{&W@#g  
/* &a];"2  
* (non-Javadoc) }~3 %KHT  
* Ss c3uo0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~<&47'D  
*/ #Hyfj j  
public void sort(int[] data) { EABy<i  
int temp; .*+KQ A8  
for (int i = 0; i < data.length; i++) { Rr3<ln  
int lowIndex = i; +7|Qd}\X  
for (int j = data.length - 1; j > i; j--) { a54qv^IS  
if (data[j] < data[lowIndex]) { Nw=mSW^E  
lowIndex = j; N0 F|r8xS  
} 6pi^rpo  
} k6PHyt`3'  
SortUtil.swap(data,i,lowIndex); A3=$I&!%  
} 1L:sck5k  
} ^J_rb;m43  
Lp}>WCams  
} __N#Y/e ]  
!mtq?LV  
Shell排序: U*7Yi-"/*  
rS/}!|uAu  
package org.rut.util.algorithm.support; ;mYj`/Yj  
_6 ,Tb]  
import org.rut.util.algorithm.SortUtil; (aa}0r5  
3(/J(8  
/** %juR6zB%8  
* @author treeroot t)hAD_sf  
* @since 2006-2-2 ywS2` (  
* @version 1.0 y8QJ=v* B  
*/ ;`P}\Q{  
public class ShellSort implements SortUtil.Sort{ Ar:ezA  
"/MA.zEl0,  
/* (non-Javadoc) \L@DDK|"`6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [O52Bn  
*/ <h7FS90S  
public void sort(int[] data) { CYCG5)<9  
for(int i=data.length/2;i>2;i/=2){ `[*nUdG  
for(int j=0;j insertSort(data,j,i); [esR!})  
} vuCl(/P`  
} Z<,$Xv L  
insertSort(data,0,1); #^FDFl  
} *>,CG:`D  
YrWC\HR_  
/** ZSo#vQ  
* @param data }&h* bim  
* @param j g)@d(EYY  
* @param i H ^<LnYZ  
*/ s/"?P/R  
private void insertSort(int[] data, int start, int inc) { kA1C&  
int temp; #kt3l59Ty  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); @\|W#,~  
} =]auP{AlE  
} :GaK.W q  
} 7Ib/Cm0d|  
Fu%%:3_  
} 1sT%g}w@|  
]tzO)c)w;  
快速排序: }9qbF+b  
Gc'CS_L  
package org.rut.util.algorithm.support; A"`^A brm  
TL?(0]H fe  
import org.rut.util.algorithm.SortUtil; qf7oG0  
W_ =  
/**  d Xiv8B1  
* @author treeroot 7K|: 7e(  
* @since 2006-2-2 5:o$]LkOWC  
* @version 1.0 O" <W<l7Q  
*/ [= GVK  
public class QuickSort implements SortUtil.Sort{ 2K Um(B.I  
ia!b0*<   
/* (non-Javadoc) qXH\e|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D]s8w  
*/ $\DOy&e  
public void sort(int[] data) { J9kmIMq-C  
quickSort(data,0,data.length-1); 9b/7~w.  
} @"\j]ZEnY  
private void quickSort(int[] data,int i,int j){ Dj~]]  
int pivotIndex=(i+j)/2; 99\;jz7  
file://swap JE<zQf(&  
SortUtil.swap(data,pivotIndex,j); *7ggw[~  
b~1]}9TJ  
int k=partition(data,i-1,j,data[j]); 9 NO^ '  
SortUtil.swap(data,k,j); PyS~2)=B  
if((k-i)>1) quickSort(data,i,k-1); B4<W%lm  
if((j-k)>1) quickSort(data,k+1,j); _msV3JBr  
d=TZaVL$$  
} Qe&K  
/** &!y7PWHJ  
* @param data ;}tEU'&  
* @param i rT2gX^Mj&  
* @param j Y SvZ7G(m>  
* @return oPX `/ X#  
*/ Tk^J#};N  
private int partition(int[] data, int l, int r,int pivot) { }SdI _sLe  
do{ )]=1W  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); = }&@XRLJ  
SortUtil.swap(data,l,r); ,Tb~+z|-[  
} b)SU8z!NV&  
while(l SortUtil.swap(data,l,r); Ag>E%N  
return l; T[z]~MJL  
} PJ=N.x f}  
p m4g),s  
} =1JS6~CTLN  
|NbF3 fD  
改进后的快速排序: [|=#~(yYQ  
CDy *8<-&  
package org.rut.util.algorithm.support; H O^3v34ZO  
BVKr 2v  
import org.rut.util.algorithm.SortUtil; wIrjWU2  
~\4B 1n7  
/** o)X(;o  
* @author treeroot RGeM.  
* @since 2006-2-2 cB;:}Q08#  
* @version 1.0 >|)ia5#  
*/ BZ]6W/0  
public class ImprovedQuickSort implements SortUtil.Sort { ')d&:K*M  
3f u*{8.XZ  
private static int MAX_STACK_SIZE=4096; j.3#rxq  
private static int THRESHOLD=10; %uuh+@/&yz  
/* (non-Javadoc) ;g3z?Uz)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j|`6[93MG  
*/ |Ef\B] Ns  
public void sort(int[] data) { uhyw?#f  
int[] stack=new int[MAX_STACK_SIZE]; P87!+pB(  
yGNZw7^(  
int top=-1; 0XrB+nt  
int pivot; 02Ftn&bi  
int pivotIndex,l,r; 9`"o,wGX3  
jWn!96NhlL  
stack[++top]=0; *K9I+t"g  
stack[++top]=data.length-1; Zz"b&`K  
7x/S4Gs'4  
while(top>0){ |x2 +O  
int j=stack[top--]; bv.DW,l%'  
int i=stack[top--]; >^1|Mg/!>  
)KZ1Z$<  
pivotIndex=(i+j)/2; a@|/D\C  
pivot=data[pivotIndex]; |-WoR u  
S?X2MX  
SortUtil.swap(data,pivotIndex,j); hEO#uAR^Z  
]!u12^A{  
file://partition +3HukoR(  
l=i-1; 5yvaY "B  
r=j; <b-BJ2],k  
do{ ,BK6a'1J  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); p^2"g~  
SortUtil.swap(data,l,r); v&6=(k{E@R  
} 45Z"U<I,9  
while(l SortUtil.swap(data,l,r); ]gN]Cw\L  
SortUtil.swap(data,l,j); f@ &?K<  
+%Vbz7+!  
if((l-i)>THRESHOLD){ 4Xna}7  
stack[++top]=i; }uI(D&?+h  
stack[++top]=l-1; @W\y#5"B  
} h[5<S&  
if((j-l)>THRESHOLD){ r ]XXN2[jO  
stack[++top]=l+1; G2FP|mf,  
stack[++top]=j; -qki^!Y?  
} jzuOs,:R  
?/mkFDN  
} vYh_<Rp5  
file://new InsertSort().sort(data); ~[@Gj{6p0  
insertSort(data); 3xhv~be  
} /Q7cQ2[EU  
/** 9N H"Ik*  
* @param data A#s`!SNv  
*/ _Qy3A T~  
private void insertSort(int[] data) {  `O-LM e  
int temp; *>Z|!{bI  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); UWdPB2x[  
} uV]4C^k;`[  
} `={s*^Ta  
} #A8d@]Ps  
U @Il:\I  
} MC.,n$O}6  
cD-.thHO  
归并排序: 8^fkY'x  
\`w!v,aM$  
package org.rut.util.algorithm.support; B/IPG~aMEZ  
y(pHt  
import org.rut.util.algorithm.SortUtil; =*q|568  
:kycIM]s  
/** WZk\mSNV  
* @author treeroot @=[/bG  
* @since 2006-2-2 zcrLd={  
* @version 1.0 K\ww,S  
*/ mU1lEx$  
public class MergeSort implements SortUtil.Sort{ ({3hX"C@Q  
I*e8 5wef  
/* (non-Javadoc) - b>"2B?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <BIj a  
*/ dhe?7r ]u  
public void sort(int[] data) { fH.:#O:  
int[] temp=new int[data.length]; GyV3]Qqj  
mergeSort(data,temp,0,data.length-1); 8?S32Gdu  
} ^'S0A=1  
+w Oa  
private void mergeSort(int[] data,int[] temp,int l,int r){ @Taj++ua  
int mid=(l+r)/2; I xT[1$e  
if(l==r) return ; _A*5BAB:h(  
mergeSort(data,temp,l,mid); e{edI{g  
mergeSort(data,temp,mid+1,r); qvz2u]IOw  
for(int i=l;i<=r;i++){ X{rw+!  
temp=data; .I{b]6  
} DpIv <m]  
int i1=l; uX{n#i,~L  
int i2=mid+1; iw<#V&([ J  
for(int cur=l;cur<=r;cur++){ ZF :e6em  
if(i1==mid+1)  ^o+}3=  
data[cur]=temp[i2++]; :+ef|,:`/  
else if(i2>r) v\*43RL  
data[cur]=temp[i1++]; ]%IcUd}  
else if(temp[i1] data[cur]=temp[i1++]; "J]_B  
else D'aq^T'  
data[cur]=temp[i2++]; H{'<v|I  
} *D ld?Q  
} hkw;W[ZWa  
-SaH_Nuj  
} _Zya GDv  
Ec| Gom?  
改进后的归并排序: <Vyv)#32o3  
<}b`2/wP  
package org.rut.util.algorithm.support; &eV& +j  
n(.y_NEgV!  
import org.rut.util.algorithm.SortUtil; 3vPb}  
5EDN 9?a  
/** e&f9/rfx  
* @author treeroot FR9<$  
* @since 2006-2-2 FjIS:9^)t5  
* @version 1.0 >TUs~  
*/ <A&mc,kj  
public class ImprovedMergeSort implements SortUtil.Sort { >*H>'O4  
R6~x!  
private static final int THRESHOLD = 10; !=@Lyt)_b  
h)BRSs?v_D  
/* b:/;  
* (non-Javadoc) 6> v`6  
* MZf$8R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }^WQNdws56  
*/ %3scz)4$  
public void sort(int[] data) { c%v[p8 %  
int[] temp=new int[data.length]; U>6MT@\  
mergeSort(data,temp,0,data.length-1); Ed,`1+  
} O{a<f7 W  
qd"1KzQWO  
private void mergeSort(int[] data, int[] temp, int l, int r) { Rkm1fYf  
int i, j, k; ')t :!#  
int mid = (l + r) / 2; kA?a}   
if (l == r) xc[@lr  
return; xRYL{+  
if ((mid - l) >= THRESHOLD) )ALPMmlRs  
mergeSort(data, temp, l, mid); zu'Uau  
else aYr?J Ol  
insertSort(data, l, mid - l + 1); h`dtcJ0  
if ((r - mid) > THRESHOLD) ~C=I{qzF+  
mergeSort(data, temp, mid + 1, r); $A"kHS7T  
else .GUm3b  
insertSort(data, mid + 1, r - mid); *JE%bQ2Q  
B1T:c4:N  
for (i = l; i <= mid; i++) { 90> (`pI=  
temp = data; w@Uw8b  
} <l]P <N8^  
for (j = 1; j <= r - mid; j++) { %eWzr  
temp[r - j + 1] = data[j + mid]; >_P7k5Y^  
} }# 'wy  
int a = temp[l]; tAFKq>\  
int b = temp[r]; ,dn9tY3  
for (i = l, j = r, k = l; k <= r; k++) { \Km!#:  
if (a < b) { P'f =r%  
data[k] = temp[i++]; `<!Nk^2ap  
a = temp; t!Q uM_i3  
} else { rF:C({y  
data[k] = temp[j--]; 1>P[3Y@}  
b = temp[j]; xgHR;US H  
} .gTla  
} 8uq^Q4SU  
} S9R(;  
'?dO[iQ$:  
/** r_nB-\  
* @param data e5G)83[=  
* @param l HE58A.Q&  
* @param i <WFA3  
*/ 52?zBl`|  
private void insertSort(int[] data, int start, int len) { stuj,8  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HA&7 ybl  
} Fw5|_@&k  
} sC >_ulkoa  
} /aS=vjs  
} K ;\~otR^  
rD=8O#m g  
堆排序: EdFCaW}""  
.j?`U[V%a  
package org.rut.util.algorithm.support; %@tKcQ  
j8n_:;i*  
import org.rut.util.algorithm.SortUtil; HS>(y2}'  
V/|).YG2  
/** :T^!<W4  
* @author treeroot wKOljE6d  
* @since 2006-2-2 Pyh+HD\  
* @version 1.0 \7rAQ[\#V  
*/ .nN=M>#/  
public class HeapSort implements SortUtil.Sort{ 4x7(50hp#  
6. N?=R  
/* (non-Javadoc) ]<b$k  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uytq,3Gj6  
*/ sd4eJ  
public void sort(int[] data) { X`#,*HkK  
MaxHeap h=new MaxHeap(); oSVo~F  
h.init(data); @>`+eg][?P  
for(int i=0;i h.remove(); <vMna< /d  
System.arraycopy(h.queue,1,data,0,data.length); K$v SdpC  
} rEz-\jLD~  
+8qtFog$\g  
private static class MaxHeap{ 9V&} %  
PdiP5S }/  
void init(int[] data){ .T~<[0Ex+U  
this.queue=new int[data.length+1]; =k.:XblEe[  
for(int i=0;i queue[++size]=data; EdGA#i3  
fixUp(size); ,fWQSc\}  
} wM.z/r\p  
} g4b-~1[S  
?LJ$:u  
private int size=0; fP3e{dVf  
cs[_TJo  
private int[] queue; EWOS6Yg7  
p7 s#j  
public int get() { kc*zP=  
return queue[1]; )Z6bMAb0'N  
} ZEY="pf  
TljN!nv]  
public void remove() { t^ _0w[  
SortUtil.swap(queue,1,size--); YywiY).]@  
fixDown(1); k3[rO}>s  
} u.v 5!G  
file://fixdown _N8Tu~lqV  
private void fixDown(int k) { *R9s0;&:  
int j; G!]%xFwYa  
while ((j = k << 1) <= size) { ,RmXZnWY  
if (j < size %26amp;%26amp; queue[j] j++; h>ZNPP8N  
if (queue[k]>queue[j]) file://不用交换 Oi#4|*b{W  
break; ]vj.s/F~  
SortUtil.swap(queue,j,k); 758`lfz=_  
k = j; nW)-bAV<  
} 5cc;8i  
} :`u?pc27Sm  
private void fixUp(int k) { WFWQ;U{|  
while (k > 1) { ^gw htnI  
int j = k >> 1; [6 d~q]KH  
if (queue[j]>queue[k]) ^RL#(O  
break; nc<w DE6  
SortUtil.swap(queue,j,k); 5x$/.U  
k = j; `O~NT'Ed8  
} Mc8|4/<Z  
} l^`& Tnzv  
2MT_5j5[N  
} lT.Q)(  
t<~WDI|AN  
} y{ & k`H  
:~uvxiF  
SortUtil: Yz<,`w5/6~  
V+\L@mz;  
package org.rut.util.algorithm; nP]tc  
Q?"o.T';  
import org.rut.util.algorithm.support.BubbleSort; Za,MzKd=  
import org.rut.util.algorithm.support.HeapSort; @8keLrp  
import org.rut.util.algorithm.support.ImprovedMergeSort; g%C!)UbT  
import org.rut.util.algorithm.support.ImprovedQuickSort; K4T#8K]aZF  
import org.rut.util.algorithm.support.InsertSort; $}&r.=J".  
import org.rut.util.algorithm.support.MergeSort; cnJL*{H<2  
import org.rut.util.algorithm.support.QuickSort; '5^$v{  
import org.rut.util.algorithm.support.SelectionSort; g/*x;d=  
import org.rut.util.algorithm.support.ShellSort; m(2(Caz{  
6d4e~F  
/** bx!uHL=  
* @author treeroot 2bJqZ,@  
* @since 2006-2-2 Lj]I7ICNh  
* @version 1.0 .&z/p3 1  
*/ 4)]w"z0Pc  
public class SortUtil { mT]+wi&  
public final static int INSERT = 1; 01N]|F:  
public final static int BUBBLE = 2; a#i85su  
public final static int SELECTION = 3; ^pI&f{q  
public final static int SHELL = 4; v?AQ&'Fk  
public final static int QUICK = 5; CMQlxX?  
public final static int IMPROVED_QUICK = 6; !WTZ =|  
public final static int MERGE = 7; x" N{5  
public final static int IMPROVED_MERGE = 8; g>k"R4  
public final static int HEAP = 9; 'eM90I%(  
t1LIZ5JY  
public static void sort(int[] data) { =1!,A  
sort(data, IMPROVED_QUICK); \VL_  
} `/|S.a#g  
private static String[] name={ eA4dDKX+  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xg:r5Z/|)  
}; 25bbuhss  
D\~s$.6B  
private static Sort[] impl=new Sort[]{ ;N+ v x  
new InsertSort(),  {J aulg  
new BubbleSort(), /5x~3~  
new SelectionSort(), 4blw9x N  
new ShellSort(), It5U=PU  
new QuickSort(), * ':LBc=%  
new ImprovedQuickSort(), cImOZx  
new MergeSort(), jCJbmEfo9@  
new ImprovedMergeSort(), <5 Ye')+  
new HeapSort() os :/-A_m  
}; ]^f7s36  
8|-j]   
public static String toString(int algorithm){ oK-T@ &-  
return name[algorithm-1]; MU  }<-1  
} [Ej#NHs  
\BRx dK'  
public static void sort(int[] data, int algorithm) { UxGr+q  
impl[algorithm-1].sort(data); *8QESF9  
} N}$$<i2o  
_oV;Y`_  
public static interface Sort { qcNu9Ih  
public void sort(int[] data); >M}\_c=  
} | c:E)S\  
R04%;p:k#  
public static void swap(int[] data, int i, int j) { k!&G ;6O-  
int temp = data; |igr3p5Fw  
data = data[j]; PIZnzZ@Z;  
data[j] = temp; "7]YvZYu0  
} >DFpL$oP  
} 5hhiP2q  
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