[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

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。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; A\`Uu&
} G1rgp>m
int i1=l; P}gh-5x
int i2=mid+1; #LiC@>
for(int cur=l;cur<=r;cur++){ RMXP)[
if(i1==mid+1) ^d,d<Uc
data[cur]=temp[i2++]; J$0*K+m
else if(i2>r) =E}/Z
data[cur]=temp[i1++]; _EP}el
else if(temp[i1] data[cur]=temp[i1++]; sC>8[Jatd
else 2 E^P=jU`
data[cur]=temp[i2++]; lgl/| ^ Uw
} L6T_&AiL$
} _ 0-YsD
tBrVg<]t
} F~EriO
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改进后的归并排序: vJ!t.Vou
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package org.rut.util.algorithm.support; /-T%yuU
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import org.rut.util.algorithm.SortUtil; 5s;#C/ZZ
c!zu0\[Id
/** W8)GT`\
* @author treeroot f&:g{K
* @since 2006-2-2 qpZ".
* @version 1.0 5gGr|d|(
*/ sMZ \6
public class ImprovedMergeSort implements SortUtil.Sort { &PbH!]yd
<javZJ
private static final int THRESHOLD = 10; Y3?kj@T`i
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/* 3iB8QO;pp
* (non-Javadoc) Nbr{)h
* `g7' )MSy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q07>FW R
*/ ;RXv%ML
public void sort(int[] data) { ]Sh&8 #
int[] temp=new int[data.length]; ][3 "xP
mergeSort(data,temp,0,data.length-1); ctf'/IZ5
} - 0zo>[c/p
.fgoEB,(
private void mergeSort(int[] data, int[] temp, int l, int r) { @Z)&3ss
int i, j, k; T"O!
int mid = (l + r) / 2; '?\Hm'8
if (l == r) xed$z
return; @_;6L
if ((mid - l) >= THRESHOLD) uaiG(O
mergeSort(data, temp, l, mid); 2l9_$evK~
else kns[b [!H
insertSort(data, l, mid - l + 1); I)clGMS,
if ((r - mid) > THRESHOLD) c8(.bmvF
mergeSort(data, temp, mid + 1, r); YPN|qn(
else `|gCbs95
insertSort(data, mid + 1, r - mid); GFvOrRlP\
# aC}\
for (i = l; i <= mid; i++) { x[]n\\a?
temp = data; Q9( eH2=
} m#uutomi0
for (j = 1; j <= r - mid; j++) { BJqM=<nQ
temp[r - j + 1] = data[j + mid]; hSxf;>(d
} p0Vw@R=
int a = temp[l]; $lvpBs
int b = temp[r]; 0'gJSrgNI
for (i = l, j = r, k = l; k <= r; k++) { )9}z^+TH
if (a < b) { 5z0SjQ
data[k] = temp[i++]; by-B).7
a = temp; b(wiJ&t
} else { Q.x3_+CX
data[k] = temp[j--]; x,n;GR
b = temp[j]; 8ED6C"6
} wuPx6hCl
} \5Hfe;ny-~
} +?%huJYK,
W)\~T:Kn
/** (|W@p\Q
* @param data GZse8ng
* @param l K1Uur>Pk%
* @param i 1g *4e
*/ J 9z\ qTI
private void insertSort(int[] data, int start, int len) { 3iDRt&y=.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WO|#`HM2
} a4c~ThbI
} l/SbJrM*
} ?>2k>~xlQ
} hW(Mf
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堆排序： lOql(ZH`w
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package org.rut.util.algorithm.support; YqYCW}$
}=NjFK_6
import org.rut.util.algorithm.SortUtil; lV3\5AEW
XJ.vj+XXb
/** <Dl7|M
* @author treeroot M5wj79'l"
* @since 2006-2-2 `C,479~J
* @version 1.0 #5F\zeo@F?
*/ $P>ci4]t
public class HeapSort implements SortUtil.Sort{ 4~D?F'o
;'*"(F=D6
/* (non-Javadoc) @Kp2l<P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OXI.>9
*/ -r[l{ce
public void sort(int[] data) { l9\ *G;
MaxHeap h=new MaxHeap(); t 7+ifSrz
h.init(data); LG(bdj"NM
for(int i=0;i h.remove(); U5odSR$
System.arraycopy(h.queue,1,data,0,data.length); MC^H N w
} q'[5h>Pa
L9"V$MO
private static class MaxHeap{ 5Osx__6$t
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void init(int[] data){ F8f@^LVM/
this.queue=new int[data.length+1]; @a+1Ri`)
for(int i=0;i queue[++size]=data; +g%kr~w=
fixUp(size); 8ex{N3
} Hr:WE+'
} LNtBYdB`pK
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private int size=0; ,@Xl?
p1q"[)WVn^
private int[] queue; Bi9 S1p
,..&j+m
public int get() { x8w455
return queue[1]; CM_FF:<tn
} ;mu^WIj
V^[o{'+
public void remove() { h#a,<B|
SortUtil.swap(queue,1,size--); xM'bb5
fixDown(1); b 'jZ4{+W
} /{6PwlP5
file://fixdown P-.>vi^+
private void fixDown(int k) { 7']n_-fu
int j; IOtSAf
while ((j = k << 1) <= size) { '(r/@%=U
if (j < size %26amp;%26amp; queue[j] j++; !K'j[cA^
if (queue[k]>queue[j]) file://不用交换 (w}iEm\b
break; )[i0~o[
SortUtil.swap(queue,j,k); W$=Ad *
k = j; vvwNJyU-
} )%I2#Q"Nt-
} [LbUlNq^B@
private void fixUp(int k) { |wZcVct~
while (k > 1) { Kf/1;:^
int j = k >> 1; fYBmW')
if (queue[j]>queue[k]) %We~k'2f
break; cia'h_w
SortUtil.swap(queue,j,k); 9Ra*bP ]1
k = j; nep0<&"
} YBehyx2eK
} *]:gEO
u_shC"X:
} B&3oo
ErnjIx:
} ;EDc1:
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SortUtil： YMb\v4
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package org.rut.util.algorithm; 2dg+R)%
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import org.rut.util.algorithm.support.BubbleSort; AwN7/M~'
import org.rut.util.algorithm.support.HeapSort; I&%{%*y
import org.rut.util.algorithm.support.ImprovedMergeSort; LQ(z~M0B
import org.rut.util.algorithm.support.ImprovedQuickSort; 9%T~^V%T7
import org.rut.util.algorithm.support.InsertSort; }coSMTMv6
import org.rut.util.algorithm.support.MergeSort; ra2sYH1wr
import org.rut.util.algorithm.support.QuickSort; l+`f\},
import org.rut.util.algorithm.support.SelectionSort; X:PB }
import org.rut.util.algorithm.support.ShellSort; Er509zZ,[
D+.< kY.
/** /P { Zo
* @author treeroot Y>W$n9d&G2
* @since 2006-2-2 o}O"
* @version 1.0 oe$&X&
*/ ?tx%KU\3
public class SortUtil { >U.
public final static int INSERT = 1; O<}3\O )G(
public final static int BUBBLE = 2; ZFYv|2l
public final static int SELECTION = 3; .LMOmc=(
public final static int SHELL = 4; B /q/6Pp
public final static int QUICK = 5; `<_A#@
public final static int IMPROVED_QUICK = 6; TkHyXOk"Ky
public final static int MERGE = 7; _sLSl;/t
public final static int IMPROVED_MERGE = 8; VAPRI\uM;
public final static int HEAP = 9; `TwDR6&
YD>5zV%!D
public static void sort(int[] data) { jT/}5\
sort(data, IMPROVED_QUICK); }(tuBJ9
} /q[5-96c
private static String[] name={ <j\osw1R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z 3((L
}; d+DdDr
CWKN0HB
private static Sort[] impl=new Sort[]{ ^K[WFiN}
new InsertSort(), }Rl^7h<!
new BubbleSort(), 2yB)2n#ut
new SelectionSort(), 9)2kjBeb
new ShellSort(), "wwAbU<
new QuickSort(), t3LRmjL
new ImprovedQuickSort(), H[oCI|k
new MergeSort(), "MS}@NLUW
new ImprovedMergeSort(), y-C=_v_X
new HeapSort() *S _[8L"
}; }MU}-6
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public static String toString(int algorithm){ QEtf-xNn^
return name[algorithm-1]; \<n 9kwU
} w2 %u;D%
fyHFfPEE
public static void sort(int[] data, int algorithm) { }enS'Fpf`
impl[algorithm-1].sort(data); R;yi58Be
} B8=r^!jEL
pX 4:WV
public static interface Sort { ,EsPm'`?A/
public void sort(int[] data); b{+7sl
} M( euwy
HgVPyo
public static void swap(int[] data, int i, int j) { WxE^S ??|
int temp = data; VKGH+j[
data = data[j]; HV0!G-h
data[j] = temp; &>%R)?SZh
} u V[:e|v
} vH[G#A~4