[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; HW[&q
} "7sv@I_j
int i1=l; zYM2`(Z 5B
int i2=mid+1; _gVihu
for(int cur=l;cur<=r;cur++){ fExFpR,`
if(i1==mid+1) ;y-JR$M
data[cur]=temp[i2++]; g}`g>&l5
else if(i2>r) IS8 sJ6")
data[cur]=temp[i1++]; ?J$k 5;
else if(temp[i1] data[cur]=temp[i1++]; YAXd
else \L>XF'o
data[cur]=temp[i2++]; d\qszYP[
} `n6cpX5
} ir'<H<t2
PZ/tkw
} HxK'u4I
l8E))oz1T
改进后的归并排序: X#T|.mCdC
dkg`T#}
package org.rut.util.algorithm.support; Y1lUO[F j
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import org.rut.util.algorithm.SortUtil; 6Zpa[,gm
*ssw`}yE'
/** !9gpuS[
* @author treeroot ->qRGUW
* @since 2006-2-2 'sAkrl8kt
* @version 1.0 JAHmmNlW
*/ Q:)4
public class ImprovedMergeSort implements SortUtil.Sort { * 0K]/tn<
u"5/QB{
private static final int THRESHOLD = 10; z~Zm1tZs
iM!V4Wih6
/* #HL$`&m
* (non-Javadoc) 7VfXE/
* +;!^aNJ,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &5jc &CS
*/ qh bagw~
public void sort(int[] data) { R:P),
int[] temp=new int[data.length]; fBTNI`#
mergeSort(data,temp,0,data.length-1); 6!)hl"
} :M;|0w*b
%D-!<)z
private void mergeSort(int[] data, int[] temp, int l, int r) { f`vWCb
int i, j, k; ^Zpz@T>m
int mid = (l + r) / 2; l
if (l == r) VB^1wm
return; L?N:4/0;!
if ((mid - l) >= THRESHOLD) 'n{=`e(}cI
mergeSort(data, temp, l, mid); !]"M]tyv\
else k=t{o
insertSort(data, l, mid - l + 1); w)go79
if ((r - mid) > THRESHOLD) LB7$&.m'B
mergeSort(data, temp, mid + 1, r); V#599-
else JWu0VLo
insertSort(data, mid + 1, r - mid); .4 NcaMj
cooicKS7
for (i = l; i <= mid; i++) { EP4?+"Z
temp = data; WO69Wo\C
} Yk{4 3yw
for (j = 1; j <= r - mid; j++) { ?/3{gOgI$`
temp[r - j + 1] = data[j + mid]; |p/[sD+M
} sNG 7fi.|
int a = temp[l]; }q_Iep
int b = temp[r]; 9u^za!pE
for (i = l, j = r, k = l; k <= r; k++) { iMYJVB=
if (a < b) { X.e4pLwGK
data[k] = temp[i++]; L$Xkx03lz>
a = temp; $W;r S7b
} else { W)2k>cS
data[k] = temp[j--]; nKwOSGPQt
b = temp[j]; gW G>}M@
} mst;q@
} x'i~o'
} AGlFbc(L
NljcHe}Qy
/** .4z_ohe
* @param data d<_IC7$u>
* @param l T~lHm
* @param i uMFV^&ZF
*/ Y,KSr|vG
private void insertSort(int[] data, int start, int len) { z4[8*}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gfXit$s
} W1}d6Sbg
} d~CZ9h
} ,PWMl[X
} (Kkqyrb
+ VhD]!
堆排序： GQ9H>Ssz
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package org.rut.util.algorithm.support; r+k~%5Ff~
F{17K$y
import org.rut.util.algorithm.SortUtil; `g'9)Xf4KT
|r`0< `
/** r[nvgzv@
* @author treeroot eeUEqM$7EX
* @since 2006-2-2 /a-OBU
* @version 1.0 G/Yqvu,2!
*/ $=!_ !tr
public class HeapSort implements SortUtil.Sort{ 8}OII\
G$iC@,/
/* (non-Javadoc) /kFw(l_.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?h-:,icR
*/ YLNJ4nE
public void sort(int[] data) { fXx !_Z
MaxHeap h=new MaxHeap(); ~hQTxLp
h.init(data); jW.IkG[|
for(int i=0;i h.remove(); y}>bJ:
System.arraycopy(h.queue,1,data,0,data.length); tc<HA7vpt~
} D"s ]dQ$r
`< cn
private static class MaxHeap{ ujoJ6UOG
}Lb[`H,}A
void init(int[] data){ /-C6I:
this.queue=new int[data.length+1]; CDDOm8
for(int i=0;i queue[++size]=data; 9d >AnTf&H
fixUp(size); >}!})]Xw9
} {$qLMx';
} y(Ck j"
LLW\1 cxi
private int size=0; 2mPU /
Q$=X ?{
private int[] queue; drf?7%v
T.#Vma
public int get() { \~@a/J
return queue[1]; U=\!`_f':
} q5ja \
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public void remove() { DH{^9HK
SortUtil.swap(queue,1,size--); z+qrsT/?L
fixDown(1); ]='zY3
} +G?nmXG[vj
file://fixdown IO]%AL(.;
private void fixDown(int k) { HD{2nZT
int j; tU>?j1
while ((j = k << 1) <= size) { yM*f}S/ (
if (j < size %26amp;%26amp; queue[j] j++; _|vY)4B4U
if (queue[k]>queue[j]) file://不用交换 -jQMh
break; 2<8JY4]!]
SortUtil.swap(queue,j,k); ^+'\ u;\
k = j; o[E|xw
} Jde@Th
} QcG-/_,'}
private void fixUp(int k) { Avn)%9
while (k > 1) { "3X~BdH&J
int j = k >> 1; z,q1TU9
if (queue[j]>queue[k]) jK9#. 0
break; [5sa1$n96G
SortUtil.swap(queue,j,k); byetbt(IF
k = j; !;s5\91
} 5Cjh%rj(jl
} /D&7 \3}
y ZR\(\?<
} 1/%g VB8
IIIP<nyc
} xN=:*#Z"pb
9L9+zs3k
SortUtil： <maYS2
2u?k;"]V
package org.rut.util.algorithm; A~MIFr/8
Hklgf
import org.rut.util.algorithm.support.BubbleSort; +_ZXzzcO<
import org.rut.util.algorithm.support.HeapSort; {;| >Qn
import org.rut.util.algorithm.support.ImprovedMergeSort; }hyl)?*~
import org.rut.util.algorithm.support.ImprovedQuickSort; 1xzOD@=dI
import org.rut.util.algorithm.support.InsertSort; c#YW>(
import org.rut.util.algorithm.support.MergeSort; hk.Zn.6A'
import org.rut.util.algorithm.support.QuickSort; HH3Ln+AWg_
import org.rut.util.algorithm.support.SelectionSort; 1aBQ.-E-
import org.rut.util.algorithm.support.ShellSort; {Jn*{5tZ>
%1^E;n
/** JuTIP6 /G
* @author treeroot @_4E^KgF
* @since 2006-2-2 5 i;n:&Y
* @version 1.0 |VxO ,[~
*/ na,i(m?l
public class SortUtil { !H/5Ud9
public final static int INSERT = 1; rVF7!|&
public final static int BUBBLE = 2; rI.CCPY~s
public final static int SELECTION = 3; $>=?'wr
public final static int SHELL = 4; 0JS#{EDh+
public final static int QUICK = 5; (f `zd.
public final static int IMPROVED_QUICK = 6; T\b-<Xle
public final static int MERGE = 7; S"skKh4w
public final static int IMPROVED_MERGE = 8; # )]L3H<
public final static int HEAP = 9; "ukiuCfVuW
/_.1f|{B
public static void sort(int[] data) { L j>HZS$F
sort(data, IMPROVED_QUICK); 5KIlU78
} oW\kJ>!
private static String[] name={ wi$,Y.:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zm+QhnY|
}; Vnvfu!>(
I5mtr
private static Sort[] impl=new Sort[]{ 5nSi29C
new InsertSort(), "nQ&~KQ
new BubbleSort(), ?@YABl
new SelectionSort(), F\IJim-Rh
new ShellSort(), 5eJMu=UpR
new QuickSort(), \~~y1.,U.
new ImprovedQuickSort(), pas^FT~
new MergeSort(), Wi%e9r{hU
new ImprovedMergeSort(), ZW)_dg9
new HeapSort() ~H~iKl}|7
}; odaCKhdk
5g\>x;cc
public static String toString(int algorithm){ :N>n1tHL;A
return name[algorithm-1]; w+W!dM
} !)-)*T
{#C)S&o)6
public static void sort(int[] data, int algorithm) { o<Y[GW1pg
impl[algorithm-1].sort(data); _ISaO C{2-
} iPeW;=-2Wk
c]1\88
public static interface Sort { K);)$8K
public void sort(int[] data); /*kc|V
} V''?kVJ
lV M)'m
public static void swap(int[] data, int i, int j) { `%ulorS
int temp = data; "%E<%g
data = data[j]; tQ7:4._
data[j] = temp; Ygs:Ox"[-G
} Xdl7'~k
} >_'0 s