[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; DB yRP-TH
} +>oVc\$
int i1=l; aT#R#7<Eg
int i2=mid+1; 5w`v 3o
for(int cur=l;cur<=r;cur++){ !V.'~xj
if(i1==mid+1) S)GWr"m-
data[cur]=temp[i2++]; f4zd(J
else if(i2>r) =@m|g )
data[cur]=temp[i1++]; .h^."+TJ
else if(temp[i1] data[cur]=temp[i1++]; -O_5OT4
else Od'!v&
data[cur]=temp[i2++]; ?0+D1w
} er}/~@JJ
} 1dOVH7
4ow)vS(
} :JSOj@s
m5sgcxt/
改进后的归并排序: +GWeu0b(~
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package org.rut.util.algorithm.support; 4.7ePbk[E
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import org.rut.util.algorithm.SortUtil; Warz"n]iC
fAfsKO*
/** PKu+$
* @author treeroot 5>7ECe*
* @since 2006-2-2 (?&X<=|"
* @version 1.0 u(?
*/ 8p7Uvn+m*
public class ImprovedMergeSort implements SortUtil.Sort { Xi5ZQo!t
Tc@r#!.m
private static final int THRESHOLD = 10; {3C~cK{
bzmT.!
/* HW{osav9
* (non-Javadoc) LN?fw
* )k3zOKZ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K!k,]90Ko
*/ JcZs\ fl9
public void sort(int[] data) { mz[rB|v"/7
int[] temp=new int[data.length]; w/N.#s^
mergeSort(data,temp,0,data.length-1); G;FY2;adK
} q?&vV`PG5
W z3y+I/&
private void mergeSort(int[] data, int[] temp, int l, int r) { 'uBW1,
int i, j, k; L!DP*XDp
int mid = (l + r) / 2; ?DkMzR)u
if (l == r) eQno]$-\
return; \no[>L]
if ((mid - l) >= THRESHOLD) 'rU [V+
mergeSort(data, temp, l, mid); y-{^L`%Mk
else GLt#]I"LY
insertSort(data, l, mid - l + 1); j"/i+r{"E
if ((r - mid) > THRESHOLD) N>7INK
mergeSort(data, temp, mid + 1, r); yuk64o2QE
else a>Uk<#>2?a
insertSort(data, mid + 1, r - mid); 6.2_UN^<
d)(61
for (i = l; i <= mid; i++) { :Cw|BX@??U
temp = data; nvxftbfE^D
} N9Yc\?_NU_
for (j = 1; j <= r - mid; j++) { JMpjiB,A}
temp[r - j + 1] = data[j + mid]; +%8c8]2
} $)mE"4FE
int a = temp[l]; 8\`]T%h
int b = temp[r]; 4)-LlYS_d<
for (i = l, j = r, k = l; k <= r; k++) { ;p/RS#
if (a < b) { G1vWHa7n;f
data[k] = temp[i++]; 91r#lDR
a = temp; R|ViLty
} else { Tv3Bej
data[k] = temp[j--]; F>)u<f,C
b = temp[j]; WtFv"$V
} $Dd IY}
} s<xD$K~rM
} Wj/.rG&tE
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/** KDuM;
* @param data "N"9PTX
* @param l S-npJh 6
* @param i G{i}z^n
*/ & p"ks8"
private void insertSort(int[] data, int start, int len) { WL7R.!P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6?Rm>+2>v
} 'u{m37ZJ
} uY,&lX+!
} m]+g[L?-
} Xp{+){Iu
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堆排序： S>aN#
ioIUIp+B~u
package org.rut.util.algorithm.support; Z'>Xn^
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import org.rut.util.algorithm.SortUtil; ?7'uo$
d90B15]gv
/** M&~3fRb4
* @author treeroot =E8lpN'
* @since 2006-2-2 g9H~\w
* @version 1.0 vdYd~>w
*/ {%'(IJ|5z
public class HeapSort implements SortUtil.Sort{ ]YQlCx`
r Ka7[/
/* (non-Javadoc) x1]^].#Eo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lq}=&)%C
*/ +iir]"8
public void sort(int[] data) { vX]\Jqy
MaxHeap h=new MaxHeap(); SgHLs
h.init(data); =K=FzV'_~
for(int i=0;i h.remove(); 0iinr:=u
System.arraycopy(h.queue,1,data,0,data.length); T/V8&'^i
} gdRwh
^TJn&k
private static class MaxHeap{ YW}q@AY7
;+g p#&i`
void init(int[] data){ [iwn"e
this.queue=new int[data.length+1]; [bIdhG
for(int i=0;i queue[++size]=data; M])Y|}wv8
fixUp(size); ((\s4-
} 81fpeoNO
} G%
En&ESWN
private int size=0; <YP>c
scCOiK)
private int[] queue; p)N=
FRQ0tIp
public int get() { G,e>dp_cPu
return queue[1]; EkgS*q_
} <- Q=h?D
FylL7n
public void remove() { (YF`#v6
SortUtil.swap(queue,1,size--); 'xm_oGWE
fixDown(1); SG2s!Ht
} ~EG`[cv
file://fixdown {O*WLZ{0
private void fixDown(int k) { "GEJ9_a[
int j; )C5<puh
while ((j = k << 1) <= size) { m:59f9WXA
if (j < size %26amp;%26amp; queue[j] j++; :D8V*F6P
if (queue[k]>queue[j]) file://不用交换 ='q:Io?T
break; 2i;G3"\
SortUtil.swap(queue,j,k); |G~LJsXW!v
k = j; UJ1iXV[h"
} hW$B;
} V~tq _
private void fixUp(int k) { 1hw1AJ}(F
while (k > 1) { aB;syl{
int j = k >> 1; Q>] iRx>MZ
if (queue[j]>queue[k]) {1;j1|CI
break; .i>; ?(GH
SortUtil.swap(queue,j,k); s"#JBw\7
k = j; O6NgI2[O
} 8rAOs\ys
} ^6bU4bA
8bLA6qmM\
} cu5Yvp
"jH=O(37
} "G-} wt+P
\/g.`Pe
SortUtil： o_p#sdt"
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package org.rut.util.algorithm; r t@Jw]az
fpJM)HU
import org.rut.util.algorithm.support.BubbleSort; vyP3]+n
import org.rut.util.algorithm.support.HeapSort; w>>)3:Ytd
import org.rut.util.algorithm.support.ImprovedMergeSort; dR<sBYo
import org.rut.util.algorithm.support.ImprovedQuickSort; EYtf>D
import org.rut.util.algorithm.support.InsertSort; w$WN` =
import org.rut.util.algorithm.support.MergeSort; 9"Oz-!Y4
import org.rut.util.algorithm.support.QuickSort; >j5) MF{"
import org.rut.util.algorithm.support.SelectionSort; x*Y&s<
import org.rut.util.algorithm.support.ShellSort; 1{i)7:Y
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/** o?$kcI4
* @author treeroot ]ppi962Z
* @since 2006-2-2 +dw$IMwb
* @version 1.0 tfW/Mf
*/ kRo dC(f @
public class SortUtil { 4NT zK
public final static int INSERT = 1; OvqCuX
public final static int BUBBLE = 2; CB{%~
public final static int SELECTION = 3; ~s{yh-B
public final static int SHELL = 4; ^m.QW*
public final static int QUICK = 5; WeNx9+2=Z
public final static int IMPROVED_QUICK = 6; s+&Ts|c#
public final static int MERGE = 7; :Fz;nG-G
public final static int IMPROVED_MERGE = 8; ?piv]Z
public final static int HEAP = 9; Ca?5bCI,
M9'Qs m
public static void sort(int[] data) { SIv8EMGo
sort(data, IMPROVED_QUICK); "jqC3$DKI
} ^-?5=\`5
private static String[] name={ S=H<5*]g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ++n"` ]o,
}; 6nqG;z-IXJ
,#3u.=IR[
private static Sort[] impl=new Sort[]{ {WQH
new InsertSort(), P0NGjS|Z{
new BubbleSort(), _PD RUJ
new SelectionSort(), X]ow5{e
new ShellSort(), Dnn$-W|NC
new QuickSort(), gKy@$at&
new ImprovedQuickSort(), JRt^YX
new MergeSort(), v-M3/*
new ImprovedMergeSort(), bfy `UZr
new HeapSort() ngJi;9X8*t
}; >=Hm2daN
6REv(E]
public static String toString(int algorithm){ W`_pjld
return name[algorithm-1]; qD=o;:~Km
} NfvvwG;M
=67dpQ'y
public static void sort(int[] data, int algorithm) { |g<1n
impl[algorithm-1].sort(data); }#}IR5`=E
} M\O6~UFq!
Tap=K|b ]
public static interface Sort { AoB~ZWq
public void sort(int[] data); jiQJ{yY
} XDs )
1T:M?N8J
public static void swap(int[] data, int i, int j) { \?uaHX`1
int temp = data; "D0:Y(\
data = data[j]; dzJ\+ @4
data[j] = temp; CA%p^4Q
} 8Q&.S)hrN
} !T;*F%G9