[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; *P}v82C N
} V8{5 y <Y>
int i1=l; iN+Tig?c
int i2=mid+1; E||[(l,b
for(int cur=l;cur<=r;cur++){ c>nXnN
if(i1==mid+1) NRgNW1#
data[cur]=temp[i2++]; rYYAZ(\8
else if(i2>r) }tRY,f
data[cur]=temp[i1++]; U$5 lh
else if(temp[i1] data[cur]=temp[i1++]; WGeTL`}dh
else bI?YNt,
data[cur]=temp[i2++]; 4tv}V:EO
} bhWH
} WYklS<B[
]5}C@W@_
} 46cd5SLK
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改进后的归并排序: DHlCus=ic
i-`n5,
package org.rut.util.algorithm.support; R<jt$--H
}+4^ZbX+:
import org.rut.util.algorithm.SortUtil; <Fa]k'<^)
PA(XdT{
/** ZW0gd7Wh
* @author treeroot 43 h0i-%1
* @since 2006-2-2 xVn"xk
* @version 1.0 qvH7otA
*/ U*sQYt<?g
public class ImprovedMergeSort implements SortUtil.Sort { 9OnH3
%8a886;2
private static final int THRESHOLD = 10; #}Qzu~
mOkf
/* q`8M9-~
* (non-Javadoc) 05cyWg9a
* L| uoFG{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VaIFE~>E&
*/ W%xg;uzp
public void sort(int[] data) { ZFAi9M
int[] temp=new int[data.length]; RN3-:Zd_X
mergeSort(data,temp,0,data.length-1); l"#}g%E
} F.0CJ7s
&(]@L\A
private void mergeSort(int[] data, int[] temp, int l, int r) { DFKumw>!
int i, j, k; Z`=[hu
int mid = (l + r) / 2; !5;A.f
if (l == r) {{WA=\N8C
return; t)*MLg<C
if ((mid - l) >= THRESHOLD) ^K#PcPF-j
mergeSort(data, temp, l, mid); UE[5Bw?4X
else :q xd])-
insertSort(data, l, mid - l + 1); dBKceL v
if ((r - mid) > THRESHOLD) Sf2pU!5n^
mergeSort(data, temp, mid + 1, r); Gqz<;y
else =D2jJk?AX
insertSort(data, mid + 1, r - mid); ;;9W/m~]
Ie[8Iot?bn
for (i = l; i <= mid; i++) { oTPPYi[r
temp = data; -Tw96 dv
} /"Bm1
for (j = 1; j <= r - mid; j++) { 'ow`ej
temp[r - j + 1] = data[j + mid]; <9]9;
} =-r[ s%t&
int a = temp[l]; 43"`gF]
int b = temp[r]; kXmnLxhS/
for (i = l, j = r, k = l; k <= r; k++) { QeK@++EVc
if (a < b) { yj6o533o
data[k] = temp[i++]; x>?jfN,e
a = temp; E0miX)AG
} else { $rAHtr
data[k] = temp[j--]; |]dA`e&y
b = temp[j]; \M H\!
} 1kG{z;9
} E,F'k2yU
} 8Rgvb3u
h@5mVTb}i
/** ;^q@w
* @param data oJcDs-!
* @param l GWNLET
* @param i y|BRAk&n
*/ H8V${&!ho
private void insertSort(int[] data, int start, int len) { CnJrJ>l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BI'}
} FCC9Ht8U?
} ,X[lC\1a
} +bG^SH2ke
} _B@=fY(g!
;b(*Bh<
堆排序： `CWI%V
Osb#<9{}
package org.rut.util.algorithm.support; mVg$z
^ |k7g
import org.rut.util.algorithm.SortUtil; i@=0fHiZQ
+1Qa7\
/** (v11;kdJB
* @author treeroot 5B&#Sh`r
* @since 2006-2-2 ,t`u3ykh
* @version 1.0 kZ&|.q1zki
*/ K3uNR w
public class HeapSort implements SortUtil.Sort{ wABaNB=9;
_Eus<c
/* (non-Javadoc) .AIlv^:|U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?#OGH`ZvkI
*/ ea"!:cL(g
public void sort(int[] data) { Q\pTyNAYn
MaxHeap h=new MaxHeap(); :[;]6;
h.init(data); %^e~;i=2
for(int i=0;i h.remove(); n"[VM=YGI
System.arraycopy(h.queue,1,data,0,data.length); 83 O+`f
} CdxEY
E\3fL"lM
private static class MaxHeap{ AqPE.mf
qb^jcy
void init(int[] data){ 2E V M*^A
this.queue=new int[data.length+1]; 5Ocd2T'
for(int i=0;i queue[++size]=data; {`2R<O
fixUp(size); 'z'q)vcr
} .AEOf0t
} Gi7jgv{{
XCQS_'D
private int size=0; udRum7XW3
3=6`'PKRQ
private int[] queue; BXNt@%
!$ $|zB%
public int get() { XkB^.[B
return queue[1]; ]_cBd)3P}
} $~h\8
tTWeOAF
public void remove() { <SiD m-=E
SortUtil.swap(queue,1,size--); "qL4D4
fixDown(1); R|7yhsJq,
} jft%\sY
file://fixdown 6kW<i,A -
private void fixDown(int k) { +&LzLF.bK
int j; ]1A"l!yf
while ((j = k << 1) <= size) { ' 0iXx
if (j < size %26amp;%26amp; queue[j] j++; B;SN}I
if (queue[k]>queue[j]) file://不用交换 ;aZ$qgN*Y
break; ,vfi]_PK
SortUtil.swap(queue,j,k); l2v4SvbX
k = j; E)eRi"a46
} 3t
} "=cWcztiP
private void fixUp(int k) { dXAKk[uf
while (k > 1) { JCjQR`)
int j = k >> 1; 19 h7 M
if (queue[j]>queue[k]) IR*g>q
break; 8no_xFA
SortUtil.swap(queue,j,k); vn n4
k = j; =bJj;bc'5
} +r7uIwi$@
} @@L@r6
#UR4I2t*
} g8 (zvG;Y
7U#`^Q}
} Vp =
"=l<%em
SortUtil： %@IZ41<C
l26DPtWi
package org.rut.util.algorithm; Dq/ _#&S
v#iKa+tx
import org.rut.util.algorithm.support.BubbleSort; TGnyN'P|
import org.rut.util.algorithm.support.HeapSort; (mq 7{;7y
import org.rut.util.algorithm.support.ImprovedMergeSort; P0m;AqS#R
import org.rut.util.algorithm.support.ImprovedQuickSort; jEQr{X7bEL
import org.rut.util.algorithm.support.InsertSort; "yR56`=
import org.rut.util.algorithm.support.MergeSort; !!Tk'=t9"3
import org.rut.util.algorithm.support.QuickSort; 1tvgM !.
import org.rut.util.algorithm.support.SelectionSort; v:s.V>{"S
import org.rut.util.algorithm.support.ShellSort; 6d~[My
+MG(YP/l
/** WNkAI9B
* @author treeroot QJFx/zU
* @since 2006-2-2 *uYnu|UQH
* @version 1.0 F(E3U'G
*/ F{*S}&q*)o
public class SortUtil { `Q2 `":
public final static int INSERT = 1; 'T54k
public final static int BUBBLE = 2; 8+Lig
public final static int SELECTION = 3; -#]?3*NO
public final static int SHELL = 4; fo])=KM
public final static int QUICK = 5; ybBLBJb
public final static int IMPROVED_QUICK = 6; 6[BQx)7T
public final static int MERGE = 7; wyO@oi Vn
public final static int IMPROVED_MERGE = 8; m ys5B}
public final static int HEAP = 9; "rz|sbj
\LB =_W$
public static void sort(int[] data) { kq6K<e4jO
sort(data, IMPROVED_QUICK); 4kO[|~#
} ^n5[pF}Gw
private static String[] name={ OuIoO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5#JGNxO
}; (;=:QjaoZ
]saf<?fzr
private static Sort[] impl=new Sort[]{ PezUG{q(
new InsertSort(), _5Q?]-M
new BubbleSort(), d)|{iUcW
new SelectionSort(), Z(AI]wk3<
new ShellSort(), S5ka;g
new QuickSort(), =LJc8@<:f
new ImprovedQuickSort(), }fw;{&s{z
new MergeSort(), _+K[1P
new ImprovedMergeSort(), U6qv8*~
new HeapSort() .)^@[yrkz
}; $NP5Z0v7
}~dXz?{p8
public static String toString(int algorithm){ Uh}n'Xd#{}
return name[algorithm-1]; .E|Hk,c9
} ,J?Hdy:R
cOra`7L`
public static void sort(int[] data, int algorithm) { "iE9X.6NMu
impl[algorithm-1].sort(data); sqHvrI
} }NPF]P;
rAD5n,M]
public static interface Sort { yG58?5\9
public void sort(int[] data); SV.\B
} }AG$E}~/
Ltpd:c
public static void swap(int[] data, int i, int j) { ~*-ar6
int temp = data; 9z5K -s
data = data[j]; M*| y&XBe
data[j] = temp; (5?5? <
} o9M[Zr1@k
} k%#`{#ni