[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; `.{U-U\
} ; D1FAz
int i1=l; 5a'yXB}
int i2=mid+1; hP?7zz$*j
for(int cur=l;cur<=r;cur++){ 7^ 4jcfJH
if(i1==mid+1) g[/^cJHQ
data[cur]=temp[i2++]; O$a#2p&
else if(i2>r) *"1~bPl
data[cur]=temp[i1++]; ; ;<J x.
else if(temp[i1] data[cur]=temp[i1++]; l`SK*Bm~<
else ./$ <J6-J
data[cur]=temp[i2++]; q1H=/[a
} 53B.2 4Tm
} \CcmePTN#x
(nGkZ}p
} "37*A<+f
+H7y/#e+3
改进后的归并排序: *5e<\{!
}04Dg'
package org.rut.util.algorithm.support; S|HY+Z6n'
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import org.rut.util.algorithm.SortUtil; F&xv z2G
/T,zZ9=
/** zVdKYs i^
* @author treeroot VsEGX@;tO
* @since 2006-2-2 4<u;a46Z#M
* @version 1.0 DlDB=N0@S
*/ :3v9h^|+
public class ImprovedMergeSort implements SortUtil.Sort { <nBo}0O}
z;J
private static final int THRESHOLD = 10; JfMJF[Mb
QV0M/k<'
/* tyB)HF
* (non-Javadoc) 8$ic~eJ
* 1YFeVMc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (wife#)~
*/ hGvqT,'
public void sort(int[] data) { d>&\V)E
int[] temp=new int[data.length]; @d&g/ccMxd
mergeSort(data,temp,0,data.length-1); 'GkvUrD9D$
} Yt{ji
h6g:(3t6m
private void mergeSort(int[] data, int[] temp, int l, int r) { L/BHexOB
int i, j, k; Vn'?3Eb<
int mid = (l + r) / 2; P@C c]Z
if (l == r) d<#p %$A4
return; QO2Ut!Y
if ((mid - l) >= THRESHOLD) 0C]4~F x~
mergeSort(data, temp, l, mid); o5P&JBX<
else %VWp&a8
insertSort(data, l, mid - l + 1); gt/!~f0r
if ((r - mid) > THRESHOLD) )!A 2>
mergeSort(data, temp, mid + 1, r); [UoqIU
else Rs2-94$!5
insertSort(data, mid + 1, r - mid); M+0x;53nz
wazP,9W?
for (i = l; i <= mid; i++) { Wm(:P
temp = data; 6+iK!&+=
} n'yl)HA~>`
for (j = 1; j <= r - mid; j++) { 8)pB_en3sO
temp[r - j + 1] = data[j + mid]; L?HF'5o
} `_GO=QQ
int a = temp[l]; YZ< NP
int b = temp[r]; >Fyu@u
for (i = l, j = r, k = l; k <= r; k++) { zrrz<dW
if (a < b) { :9`qogF>
data[k] = temp[i++]; MI\]IQU
a = temp; Ir/:d]N*
} else { \#++s&06
data[k] = temp[j--]; 3w6&&R9
b = temp[j]; X'@'/[?
} *Rq`*D>:U}
} 3T1P$E" m
} +C_*Vs@4
RyuEHpN}
/** t@)my[!
* @param data 8"i/wMP]
* @param l ENq"mwV|
* @param i r{S=Z~J
*/ =UNT.]
private void insertSort(int[] data, int start, int len) { )pS8{c)E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g2=}G<*0
} \-OC|\{32
} 0R|K0XH#$
} Z(HZB
} $T),DUYO
p.C1nh
堆排序： cz#_<8'N
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package org.rut.util.algorithm.support; &hI>L
333u]
import org.rut.util.algorithm.SortUtil; %}h`+L
4{Udz!
/** 9#Y2`pT
* @author treeroot zmb@*/fK
* @since 2006-2-2 p![&8i@ym
* @version 1.0 :_Fxy5}
*/ Hd0Xx}3&
public class HeapSort implements SortUtil.Sort{ Vv7PCaq
Xhse~=qA
/* (non-Javadoc) P>wZ~Hjk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #h N.=~
*/ .!yq@Q|=u
public void sort(int[] data) { 4fty~0i=z
MaxHeap h=new MaxHeap(); 4%7s259%
h.init(data); ~^$MA$/p
for(int i=0;i h.remove(); g\&2s,
System.arraycopy(h.queue,1,data,0,data.length); =Z`0>R`
} >A($8=+#x
[D[D`gpjA
private static class MaxHeap{ t8vc@of$c,
;&kn"b}G;
void init(int[] data){ iNJAZ6@+
this.queue=new int[data.length+1]; 6vobta^w
for(int i=0;i queue[++size]=data; \Yq0 zVol
fixUp(size); "0-y*1/m
} lR@& Z6lw
} B+46.bIH
! =WcF5
private int size=0; H)5QqZ8
,QvYTJ{
private int[] queue; F7T E|LZ
]fE3s{y &-
public int get() { p=B?/Sqa
return queue[1]; y(v_-6b
} -B9S}NPo
q- :4=vkn
public void remove() { yW("G-Nm
SortUtil.swap(queue,1,size--); d}-'<Z#G
fixDown(1); xNX'~B^4d
} j#3m|dQ
file://fixdown TQJF+;%
private void fixDown(int k) { t',BI
int j; v=p0 +J>
while ((j = k << 1) <= size) { 9p`r7:
if (j < size %26amp;%26amp; queue[j] j++; JIxiklk
if (queue[k]>queue[j]) file://不用交换 M&yqfb[
break; J=*K"8Qr
SortUtil.swap(queue,j,k); )GJP_*Ab
k = j; v[&'k\
} ,I`_F,
} tD-gc''H
private void fixUp(int k) { _whF^g8
while (k > 1) { |<(t}}X
int j = k >> 1; XLb0 9;
if (queue[j]>queue[k]) A1-qtAO]
break; 0d4cE10
SortUtil.swap(queue,j,k); qq;b~ 3kW
k = j; zvr\36
} !ZrB^?sO
} |$e:*
/U*yw5
} 4j3oT)+8
rk,p!}FqL
} H]Wp%"L
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SortUtil： !O{z 3W
h|p[OecG
package org.rut.util.algorithm; R1'`F{56
?N>pZR
import org.rut.util.algorithm.support.BubbleSort; e{C6by"j{S
import org.rut.util.algorithm.support.HeapSort; yvxl_*Ds8
import org.rut.util.algorithm.support.ImprovedMergeSort; ^>m^\MuZ
import org.rut.util.algorithm.support.ImprovedQuickSort; V;93).-$
import org.rut.util.algorithm.support.InsertSort; Dp^/gL=
import org.rut.util.algorithm.support.MergeSort; {?i)K X^
import org.rut.util.algorithm.support.QuickSort; D{C:d\ e)$
import org.rut.util.algorithm.support.SelectionSort; J^ ={}
import org.rut.util.algorithm.support.ShellSort; cy1jZ1)
0JXqhc9'
/** TpP8=8_Lh
* @author treeroot 9=$!gC)
* @since 2006-2-2 bk3Unreh
* @version 1.0 )N7n,_#T>
*/ l~1AT%
public class SortUtil { KzVTkDn,
public final static int INSERT = 1; /6U 4S>'(
public final static int BUBBLE = 2; };sMU6e
public final static int SELECTION = 3; <*Y'lV
public final static int SHELL = 4; ~E*d G
public final static int QUICK = 5; z+39ee
public final static int IMPROVED_QUICK = 6; R2LK.bTVn
public final static int MERGE = 7; Y&~M7TYb
public final static int IMPROVED_MERGE = 8; s'L?;:)dyB
public final static int HEAP = 9; a+?~;.i~
'm O2t~n
public static void sort(int[] data) { )(bxpW
sort(data, IMPROVED_QUICK); j}RzXJ~t
} XnXb&@Y
private static String[] name={ !Iq{ 5:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &1GUi{I
}; U8O(;+
70Ka!
private static Sort[] impl=new Sort[]{ 3ATjsOL
new InsertSort(), Hr }k5'
new BubbleSort(), ow.6!tl0=h
new SelectionSort(), x~/+RF XF
new ShellSort(), onl>54M^
new QuickSort(), f0oek{
new ImprovedQuickSort(), Kx6y" {me|
new MergeSort(), R8<eN9bJ9
new ImprovedMergeSort(), iV hJH4
new HeapSort() .Z%G@X*
}; >;nS8{2o
iZ;TYcT
public static String toString(int algorithm){ np6HUH
return name[algorithm-1]; ]}2Ztr)zZ
} nY^Nbh0
d 4O
public static void sort(int[] data, int algorithm) { ;[6&0!N\
impl[algorithm-1].sort(data); ~FUa:KYD
} qY# d+F,t
nb+m.X
public static interface Sort { <k]qH-v4
public void sort(int[] data); 8(xw?|D7
} i2`0|8mw'
N5 n>
public static void swap(int[] data, int i, int j) { /#t&~E_|
int temp = data; _P5P(^/
data = data[j]; 0"4@;e_)>
data[j] = temp; 7Dt"]o"+
} wUp)JI
} P*G+eqX