[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; nhG J
} "O8gJ0e
int i1=l; IVlf=k
int i2=mid+1; ) 'j:
for(int cur=l;cur<=r;cur++){ [~:-&
if(i1==mid+1) SWp1|.=Sm
data[cur]=temp[i2++]; zqDR7+]
else if(i2>r) g%u&Zkevx
data[cur]=temp[i1++]; `OymAyEYQ
else if(temp[i1] data[cur]=temp[i1++]; ~}K5#<
else g*w<*
data[cur]=temp[i2++]; K78rg/`
} 86f2'o+
} Tz2-Bp]h
(M =Y&M'f
} (HoqR
i&8FBV-
改进后的归并排序: g'];Estb~
9 2MTX Osp
package org.rut.util.algorithm.support; '8Phxx|
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import org.rut.util.algorithm.SortUtil; T5Dw0Y6u,
Th`skK&U
/** S osj$9E
* @author treeroot 1b8p~-LsU
* @since 2006-2-2 VL' fP2
* @version 1.0 MxzLK%am
*/ Knhp*V?
public class ImprovedMergeSort implements SortUtil.Sort { q9"=mO0J+
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private static final int THRESHOLD = 10; 0J.dG/I%
:b[` v
/* LJX-AO.4
* (non-Javadoc) )} DUMq7
* pf4 ^Bk}e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eT'nl,e|
*/ Vtppuu$
public void sort(int[] data) { 9+,R`v
int[] temp=new int[data.length]; t6c<kIQ:-O
mergeSort(data,temp,0,data.length-1); "^I mb,
} Nr2C@FU:0
uS&|"*pR
private void mergeSort(int[] data, int[] temp, int l, int r) { Ax oD8|
int i, j, k; M5T9JWbN
int mid = (l + r) / 2; xoB},Xl$D
if (l == r) ?=GXqbS"
return; 8+mH:O
if ((mid - l) >= THRESHOLD) yGg,$WM
mergeSort(data, temp, l, mid); E&yD8=vw
else crO@?m1
insertSort(data, l, mid - l + 1); CukC6ub
if ((r - mid) > THRESHOLD) d2X[(3
mergeSort(data, temp, mid + 1, r); [<`SfE
else |%~+2m
insertSort(data, mid + 1, r - mid); QrApxiw
zF4[}*
for (i = l; i <= mid; i++) { ,fEO> i
temp = data; Z -%(~
} 61U<5:#l
for (j = 1; j <= r - mid; j++) { Cw5%\K$=
temp[r - j + 1] = data[j + mid]; co_oMc
} !~_zm*CqbZ
int a = temp[l]; tgL$"chj@x
int b = temp[r]; y{q*s8NY
for (i = l, j = r, k = l; k <= r; k++) { zU6a'tP
if (a < b) { jQU"Ved
data[k] = temp[i++]; K!D o8|
a = temp; yV)m"j
} else { {f9{8-W<u
data[k] = temp[j--]; 0oy-os
b = temp[j]; jClj_E
} 7\o!HMfK
} [6jbgW~E
} ch5s<x#CE
>]'yK!a?
/** 9*6]&:fm
* @param data \qsw"B*tv`
* @param l L]a`"CH:a$
* @param i TEUY3z[g
*/ KlK`;cr?
private void insertSort(int[] data, int start, int len) { \3Oij^l0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @|yeqy_:
} 2?Ye*-
} ry};m_BY
} v+6@cC
} =Nz0.:
!gwjN_ZJ^
堆排序： 3E}EBJLsZ
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package org.rut.util.algorithm.support; DjMf,wX-{
#G9 adK5
import org.rut.util.algorithm.SortUtil; 57F%j3.|/
vUC!fIG
/** /R X1UQ.s
* @author treeroot O!D/|.Q#%
* @since 2006-2-2 P`U<7xF~
* @version 1.0 NV4g~+n
*/ PIcrA2ll
public class HeapSort implements SortUtil.Sort{ 2EQ6J
0;sRJ
/* (non-Javadoc) Ct$82J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -6Tk<W
*/ @|bP+8oU
public void sort(int[] data) { "Clz'J]{
MaxHeap h=new MaxHeap(); 8l/[(] &
h.init(data); 1|,Pq9
for(int i=0;i h.remove(); gG54:
System.arraycopy(h.queue,1,data,0,data.length); N132sN2
} fYebB7Pv
eT"Uxhs-}
private static class MaxHeap{ O`FqD{@V
mN0=i(H<
void init(int[] data){ tXF]t
this.queue=new int[data.length+1]; (yQ 5`
for(int i=0;i queue[++size]=data; {u7##Vrgt8
fixUp(size); $ &5w\P
} b syq*
} G,&%VQ3P>
iNcZ)m/
private int size=0; 5IVksg
:lcea6iO
private int[] queue; 9T2xU3UyY
?y},,
public int get() { (k-YI{D3
return queue[1]; jm>3bd
} Hr;h4J
HN5W@5m: .
public void remove() { mkvvNm3
SortUtil.swap(queue,1,size--); hJ%1
fixDown(1); h -_&MD/J
} (J:dK=O@Z
file://fixdown ic6L9>[
private void fixDown(int k) { Y5A~E#zw
int j; [nN7qG
while ((j = k << 1) <= size) { OKuD"
if (j < size %26amp;%26amp; queue[j] j++; HgJb4Fi
if (queue[k]>queue[j]) file://不用交换 'TN)Lb*
break; }|8*sk#[
SortUtil.swap(queue,j,k); g=]&A
k = j; g;F"7 ^sg
} }4jC_ZAupt
} ty1fcdFZM
private void fixUp(int k) { lXrD!1F
while (k > 1) { T!q_/[i~7
int j = k >> 1; o|S)C<w
if (queue[j]>queue[k]) <MD;@_Nz\
break; ru.5fQU
SortUtil.swap(queue,j,k); 74vmt<Q
k = j; NlR"$
} :x>T}C<Y
} #Olg(:\
<SXZx9A!
} +Al>2~
=7[)'
} vM0_>1nN
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SortUtil： o sdOw8
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package org.rut.util.algorithm; #JNy
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import org.rut.util.algorithm.support.BubbleSort; H9"= p
import org.rut.util.algorithm.support.HeapSort; oC dGQ7G}
import org.rut.util.algorithm.support.ImprovedMergeSort; 9$WJ"]
import org.rut.util.algorithm.support.ImprovedQuickSort; =v2%Vs\7k
import org.rut.util.algorithm.support.InsertSort; +Takde%~
import org.rut.util.algorithm.support.MergeSort; ]Bu DaxWN
import org.rut.util.algorithm.support.QuickSort; %&] 1FhL
import org.rut.util.algorithm.support.SelectionSort; p]LnE`v
import org.rut.util.algorithm.support.ShellSort; )y50Mb0+
&H;8QZ8uw
/** p,#6 @*
* @author treeroot ;"7/@&M\m
* @since 2006-2-2 ^KHLBSc:
* @version 1.0 -Q[g/%
*/ 9{J?HFw*;
public class SortUtil { w$Ux?y-L
public final static int INSERT = 1; to3?$-L
public final static int BUBBLE = 2; aPIr_7e
public final static int SELECTION = 3; N)OCSeh
public final static int SHELL = 4; #qL9{P<}
public final static int QUICK = 5; n E:'Zxj
public final static int IMPROVED_QUICK = 6; (9.yOc4
public final static int MERGE = 7; cK}Pf+r>
public final static int IMPROVED_MERGE = 8; ,7/ _T\d<
public final static int HEAP = 9; XCPb9<L
'"O&J}s;
public static void sort(int[] data) { T&}Ye\%
sort(data, IMPROVED_QUICK); V:^H4WvL\W
} 2;(W-]V?
private static String[] name={ ZxSsR{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bhuw(KeB
}; 8]*Q79
=y;@?=T
private static Sort[] impl=new Sort[]{ aPBX=;(
new InsertSort(), JieU9lA^&B
new BubbleSort(), gA +:CgQ
new SelectionSort(), OD4W}Y.
new ShellSort(), jb@\i@-
new QuickSort(), "\T"VS^pd
new ImprovedQuickSort(), `7B14:\A
new MergeSort(), : ^(nj7D
new ImprovedMergeSort(), N du7nKG
new HeapSort() &c^7O#j
}; m#ad6 \
A~y VYC6l
public static String toString(int algorithm){ R7K
return name[algorithm-1]; wXCyj+XB*
} n&7@@@cA
NG-`ag`s
public static void sort(int[] data, int algorithm) { ]7<m1Lg
impl[algorithm-1].sort(data); N{pa) /
} D0M!"c>\
GVp
public static interface Sort { hmzair3X
public void sort(int[] data); -Op@y2+c
} ABiC9[Q0
j;0ih_Z@4W
public static void swap(int[] data, int i, int j) { iPFL"v<#J
int temp = data; M7p8^NL
data = data[j]; jeFN*r_
data[j] = temp; 'Kd7l}e!
} 32KR--mn%
} [f(uqLdeM