[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; S/G,A,"c
} ed'}ReLK
int i1=l; f0IljY!.
int i2=mid+1; ga4 gH>4
for(int cur=l;cur<=r;cur++){ 83412@&
if(i1==mid+1) )XnG.T{0|
data[cur]=temp[i2++]; HsR#dp+s~
else if(i2>r) @1*lmFq'kV
data[cur]=temp[i1++]; +LV'E#h!Q
else if(temp[i1] data[cur]=temp[i1++]; 2GqPS
else 28f-8B
data[cur]=temp[i2++]; 5caYA&R
} N>/*)Frt
} [YHvyfk~_
zv@'x nY]
} eG"iJ%I
q&<#)#+
改进后的归并排序: /quf'CV}
W ;P1T"*A
package org.rut.util.algorithm.support; 'uo`-Y
~BERs;4
import org.rut.util.algorithm.SortUtil; \xDu#/^
[9BlP
/** "2HRuqf
* @author treeroot d%t]:41=Z
* @since 2006-2-2 umcbIi('
* @version 1.0 $-=aqUU
*/ T55l-.>
public class ImprovedMergeSort implements SortUtil.Sort { )_GM&-
]WWre},
private static final int THRESHOLD = 10; !Ya +
~_8Ve\Y^/
/* B 0 K2Uw
* (non-Javadoc) Y@9L8XNP>
* TbIM{X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nd3]&occ
*/ x^+ C[%
public void sort(int[] data) { L]K*Do
int[] temp=new int[data.length]; iJ?8)}
mergeSort(data,temp,0,data.length-1); Q,#M 0
} 'x+0 yd
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private void mergeSort(int[] data, int[] temp, int l, int r) { l]sO[`X
int i, j, k; 4=o3ZRV
int mid = (l + r) / 2; (pi7TSJ
if (l == r) z9w@-])
return; yC+N18y?
if ((mid - l) >= THRESHOLD) K ANE"M
mergeSort(data, temp, l, mid); .Z%7+[
else px//q4U
insertSort(data, l, mid - l + 1); n 'P:
if ((r - mid) > THRESHOLD) &0(2Z^Z>fw
mergeSort(data, temp, mid + 1, r); 7 aDI6G
else S~(4q#Dt-
insertSort(data, mid + 1, r - mid); &U4]hawbOU
<Cg;l<$`b
for (i = l; i <= mid; i++) { `3pe\s
temp = data; j@GMZz<
} m9#u.Q*
for (j = 1; j <= r - mid; j++) { U|{WtuR
temp[r - j + 1] = data[j + mid]; vbDw2
} o<Y|N
int a = temp[l]; `c:'il?
int b = temp[r]; 7c %@2
for (i = l, j = r, k = l; k <= r; k++) { &sS k~:
if (a < b) { _j%Rm:m;<
data[k] = temp[i++]; ,J}lyvkd
a = temp; M8KfC!
} else { <i]%T~\Af)
data[k] = temp[j--]; m+OR W"o
b = temp[j]; $XyGCn
} }Lb];hww1
} Wv=L_E_
} Z]w_2- -
cb'8Li8,j
/** wTIf#y1=9
* @param data WCR+ZXI?1
* @param l elKQge
* @param i nJ*NI)
*/ /jj!DO#
private void insertSort(int[] data, int start, int len) { _xUhDu%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]"/ *7NM
} ,l0s(Cg
} GExG1n-
} ya:H{#%6
} (a^F`#]
#:s'&.6
堆排序： &RROra
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package org.rut.util.algorithm.support; D|=QsWZI
'O{hr0q}
import org.rut.util.algorithm.SortUtil; Jc:G7}j6
PU-~7h+$
/** 5.GBd_;
* @author treeroot <}4|R_xY#
* @since 2006-2-2 6@l:(-(j2A
* @version 1.0 "Ww^?"jQ)
*/ cst=ms
public class HeapSort implements SortUtil.Sort{ "K\Rq+si
nF=Ig-NX^
/* (non-Javadoc) 4a!L/m*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3J(STIxg
*/ kY_UY~E
public void sort(int[] data) { qZ1fQN1yG
MaxHeap h=new MaxHeap(); 0 ?2#SM
h.init(data); YLFTf1G9
for(int i=0;i h.remove(); r5s*"z
System.arraycopy(h.queue,1,data,0,data.length); }\gpO0Ox
} mY`b|cS3p$
8\I(a]kM`
private static class MaxHeap{ 8i:b~y0
6PPvfD^
void init(int[] data){ \ g0
this.queue=new int[data.length+1]; "4"L"lJ
for(int i=0;i queue[++size]=data; R0/~) P
fixUp(size); ZT^PL3j+
} [Xz7.<0#U
} Mm/GIa
O$&p<~
private int size=0; M2oKLRt)L
c!841~p(Q
private int[] queue; /,:32H
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public int get() { E* lqCh
return queue[1]; @l;f';+
} ~+T~}S
~&yaIuW<
public void remove() { x1Si&0T0P<
SortUtil.swap(queue,1,size--); ]h|GaHiE
fixDown(1); =3( ZUV X
} f3596a
file://fixdown a\%g_Q){
private void fixDown(int k) { 0e}LZ,9e
int j; kXOlZC
while ((j = k << 1) <= size) { SQz>e
if (j < size %26amp;%26amp; queue[j] j++; ]I}' [D
if (queue[k]>queue[j]) file://不用交换 L3kms6ch
break; [e*8hbS
SortUtil.swap(queue,j,k); 5,mb]v0k
k = j; E4{^[=}
} W0nRUAo[
} BRW
private void fixUp(int k) { QTLOP~^
while (k > 1) { =j}00,WH
int j = k >> 1; Ur@'X-
if (queue[j]>queue[k]) FD`V39##
break; 3ea6g5kX
SortUtil.swap(queue,j,k); sxuYwQ
k = j; Z#Zk)
} zCco/]h
} Zd~Z`B} &
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} n=yFw\w'
=nY*,Xu<
} @0)bY*njj
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SortUtil： : 0%V:B
ey Cg *
package org.rut.util.algorithm; F5*Xx g}N
cy}2~w&s4
import org.rut.util.algorithm.support.BubbleSort; N:d" {k
import org.rut.util.algorithm.support.HeapSort; Q}m)Q('Rk
import org.rut.util.algorithm.support.ImprovedMergeSort; K}wUM^
import org.rut.util.algorithm.support.ImprovedQuickSort; A46y?"]/30
import org.rut.util.algorithm.support.InsertSort; k|g~xmI;
import org.rut.util.algorithm.support.MergeSort; IPY@9+]
import org.rut.util.algorithm.support.QuickSort; M<)HJ lr
import org.rut.util.algorithm.support.SelectionSort; gGZ$}vX
import org.rut.util.algorithm.support.ShellSort; GbMSO
zx\?cF
/** YxsWY7J
* @author treeroot g@S"!9[;U
* @since 2006-2-2 G_X'd
* @version 1.0 ci*Z9&eS+
*/ X"[c[YT!%[
public class SortUtil { >Ks|yNJ
public final static int INSERT = 1; #|gt(p]C
public final static int BUBBLE = 2; S(rA96n
public final static int SELECTION = 3; .=K@M"5&
public final static int SHELL = 4; G8<,\mg+
public final static int QUICK = 5; /r]IY.
public final static int IMPROVED_QUICK = 6; WAob"`8]
public final static int MERGE = 7; Ao=.=0os
public final static int IMPROVED_MERGE = 8; ^(a%B
public final static int HEAP = 9; 0P!6 .-XU
QRa>W/N
public static void sort(int[] data) { !qy/'v4
sort(data, IMPROVED_QUICK); )WBTqML[
} C9*'.~
private static String[] name={ v_oNM5w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Ok*Or
}; *xt3mv/<z
OHH wcJ7N
private static Sort[] impl=new Sort[]{ -,p(PK
new InsertSort(), \]o#tYN\a0
new BubbleSort(), yyBy|7QgO
new SelectionSort(), :;]6\/ky
new ShellSort(), QZzi4[-as
new QuickSort(), N|8TE7- F|
new ImprovedQuickSort(), O[q {y
new MergeSort(), dx:],VB
new ImprovedMergeSort(), 6R#f 8
new HeapSort() -x7b6o>$
}; [['un\~r~
s_VP(Fe@K
public static String toString(int algorithm){ )Ibp%'H
return name[algorithm-1]; EAx@a%
} rbs:qLa%
,qt9S0QS
public static void sort(int[] data, int algorithm) { ,AWN *OS
impl[algorithm-1].sort(data); Joe k4t&0<
} \J:/l|h
l*/I ;a$
public static interface Sort { @@_f''f$
public void sort(int[] data); @Vc*JEW
} H}X3nl\]
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public static void swap(int[] data, int i, int j) { rFdovfb
int temp = data; R~;<}!Gtx
data = data[j]; nKufVe
data[j] = temp; V[Auw3)
} NtSa#$A
} )CEfG