[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; .c&&@>m@.
} V8nQ/9R;
int i1=l; $_;rqTk]g
int i2=mid+1; {to(?`Y
for(int cur=l;cur<=r;cur++){ qA\&%n^j]
if(i1==mid+1) vH-|#x~
data[cur]=temp[i2++]; B8?9L8M}
else if(i2>r) po\jhfn
data[cur]=temp[i1++]; 1L+hI=\O
else if(temp[i1] data[cur]=temp[i1++]; w\0vP
else +H?g9v40
data[cur]=temp[i2++]; VcXr!4M
} 1h(IrV5g
} oV;sd5'LG
j`q>YPp
} \At~94
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改进后的归并排序: >N2kWSa
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package org.rut.util.algorithm.support; #pgD-0_
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import org.rut.util.algorithm.SortUtil; X lItg\R
_>]/.w2=
/** Z.!<YfA)
* @author treeroot 7w" !"W#
* @since 2006-2-2 vea{o35!
* @version 1.0 lR7;{zlSf'
*/ _ Pzgn@D
public class ImprovedMergeSort implements SortUtil.Sort { H! 5Ka#B
8+dsTX`|S
private static final int THRESHOLD = 10; JP0aNu
-^yc<%U
/* fZr{x$]N0
* (non-Javadoc) a%BC{XX
* 3UW`Jyd`k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uL-kihV:-
*/ &=*1[j\
public void sort(int[] data) { E2dS@!]V
int[] temp=new int[data.length]; lhJY]tQt/
mergeSort(data,temp,0,data.length-1); t#_6GL
} llR5qq=t
/Dd x[P5p=
private void mergeSort(int[] data, int[] temp, int l, int r) { eY`9J4o'
int i, j, k; PX_9i@ZG
int mid = (l + r) / 2; |v@_~HV
if (l == r) Og1\6Q
return; F.x7/;
if ((mid - l) >= THRESHOLD) Rf8ZH
mergeSort(data, temp, l, mid); IKnf
else CQ<d
insertSort(data, l, mid - l + 1); .sQV0jF{
if ((r - mid) > THRESHOLD) x1`(Z|RJ
mergeSort(data, temp, mid + 1, r); o6|- :u5_/
else H1%o)'Kut4
insertSort(data, mid + 1, r - mid); l{.PyU5)
*0@Z+'M?
for (i = l; i <= mid; i++) { jg'"?KSU~
temp = data; f. >[ J
} T"3LO[j+
for (j = 1; j <= r - mid; j++) { Yc-5Mr8*,
temp[r - j + 1] = data[j + mid]; E&z^E2
} FZ<6kk4
int a = temp[l]; ib 'l:GM
int b = temp[r]; 2-qWR<E
for (i = l, j = r, k = l; k <= r; k++) { 42hG}Gt
if (a < b) { f%t N2k
data[k] = temp[i++]; c)N_"#&
a = temp; ZVJ6 {DS/
} else { "QS(4yw?jg
data[k] = temp[j--]; g8&& W_BI
b = temp[j]; \24'iYtqW
} }id)~h_@
} )BI%cD
} .Jg<H %%f
n#WOIweInf
/** {wt9/IlG1
* @param data Gdx%#@/
* @param l .Wp(@l'Hd
* @param i |B$JX'_
*/ *gGw/jA/
private void insertSort(int[] data, int start, int len) { Lw^%<.DM+t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QD^=;!
} pX3El$p
} Sh-B!
} WuF\{bUh
} K*'AjT9wX+
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堆排序： XPq`;<G
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package org.rut.util.algorithm.support; 5syzh S
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import org.rut.util.algorithm.SortUtil; w""u]b%:r
Ktzn)7-
/** 7KRNTnd
* @author treeroot 5oYeUy>N
* @since 2006-2-2 Fd80T6[
* @version 1.0 `LIlR8&@aX
*/ WTt /y\'6
public class HeapSort implements SortUtil.Sort{ K^GvU0\
`Has3AX8
/* (non-Javadoc) 1 rbc}e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HlkjyD8
*/ &.z-itiV
public void sort(int[] data) { *"F*6+}w"
MaxHeap h=new MaxHeap(); F/p1?1M
h.init(data); cMy?&
for(int i=0;i h.remove(); F{7 BY~d
System.arraycopy(h.queue,1,data,0,data.length); L7(.dO0C
} d@cyQFX
_3f/lG?&-
private static class MaxHeap{ 1uA-!T*e>
Ly, ];
void init(int[] data){ JPT&!%~
this.queue=new int[data.length+1]; r[kHVT8
for(int i=0;i queue[++size]=data; !{uV-c-5,
fixUp(size); F3Vvqt*2
} U;.cXU{
} I|>IV
ci(BPnQ
private int size=0; -ECnX/ "
p"cY/2w:j
private int[] queue; WwSyw?T
@.`HvS
public int get() { hdM?Uoo(4a
return queue[1]; *x2u
} Pj8Vl)8~NV
}gX4dv B
public void remove() { 5/m*Lc+r
SortUtil.swap(queue,1,size--); Ai)Q(]
fixDown(1); Mwj7*pxUh
} {Y]3t9!\
file://fixdown N;m62N
private void fixDown(int k) { p<@+0Uw2
int j; GBd mT-7
while ((j = k << 1) <= size) { B]7QOf"
if (j < size %26amp;%26amp; queue[j] j++; &\/}.rF
if (queue[k]>queue[j]) file://不用交换 iHo0:J~
break; *;t_VlaZ
SortUtil.swap(queue,j,k); n1+J{EPH
k = j; )5;|mV
} E*9W'e~=
} \jkDRR[
private void fixUp(int k) { V+*1?5w
while (k > 1) { 6ESS>I"su
int j = k >> 1; )OGO wStz
if (queue[j]>queue[k]) "bO]AG
break; GCcSI;w
SortUtil.swap(queue,j,k); J/vcP
k = j; EJaO"9 (
} Z>@\!$Mc
} jJ_6_8#
SS,'mv
} aMJ9U)wnK
@(tuE
} <("P5@cExU
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SortUtil： 6XeqK*r*
O}lqY?0*
package org.rut.util.algorithm; a9nXh6
AlgVsE%Va
import org.rut.util.algorithm.support.BubbleSort; VD=F{|^
import org.rut.util.algorithm.support.HeapSort; n6INI~,
import org.rut.util.algorithm.support.ImprovedMergeSort; h&{>4{
import org.rut.util.algorithm.support.ImprovedQuickSort; xoE,3Sn
import org.rut.util.algorithm.support.InsertSort; P(zquKm
import org.rut.util.algorithm.support.MergeSort; B"RZpx
import org.rut.util.algorithm.support.QuickSort; iF+50d
import org.rut.util.algorithm.support.SelectionSort; 1 7hXg"B
import org.rut.util.algorithm.support.ShellSort; 0L7^Vr)
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/** jBd9 $`
* @author treeroot :4238J8
* @since 2006-2-2 ."v&?o Ck]
* @version 1.0 ou&7v<)x4
*/ nZS*"O#L
public class SortUtil { gi\UNT9x
public final static int INSERT = 1; K9'AYFse
public final static int BUBBLE = 2; hN:2(x
public final static int SELECTION = 3; FkoN+\d
public final static int SHELL = 4; LGVGr
public final static int QUICK = 5; Tj=g[)+K
public final static int IMPROVED_QUICK = 6; qjvIp-
public final static int MERGE = 7; v#KE"m
public final static int IMPROVED_MERGE = 8; K~z9b4a>
public final static int HEAP = 9; *icxK
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public static void sort(int[] data) { kI$X~s$r
sort(data, IMPROVED_QUICK); zB{be_Tw
} JvLa@E)
private static String[] name={ :cTwp K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dr"F5Wbg
}; gB#$"mq,
y `w5u.'
private static Sort[] impl=new Sort[]{ TqMy">>
new InsertSort(), 4dvuw{NZ
new BubbleSort(), V6 ,59
new SelectionSort(), )'?@raB!
new ShellSort(), u:4?$%rB
new QuickSort(), ^`!EpO>k9
new ImprovedQuickSort(), o"A%dC_
new MergeSort(), nF|m*_DW
new ImprovedMergeSort(), <0)@Ikhx
new HeapSort() 5 %aT
}; $;+`sVG
o//PlG~
public static String toString(int algorithm){ T k>N4yq
return name[algorithm-1]; $yg}HS7HC
} C0Ti9
ldm=uW
public static void sort(int[] data, int algorithm) { l.i&.;f
impl[algorithm-1].sort(data); C{):jH,Rf
} y#;@~S1W
V?Zvu9b&
public static interface Sort { 0IjQqI
public void sort(int[] data); "Mmvf'N
} /!0{9F<
jCbxI^3A
public static void swap(int[] data, int i, int j) { :j,e0#+sA
int temp = data; t%<d}QuHW
data = data[j]; zc-.W2"Hu
data[j] = temp; J;BG/VI1
} +hS}msu'
} :ITz\m