[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; }%jpqip
} U 8p %MFD
int i1=l; >M!LC
int i2=mid+1; S("dU`T?
for(int cur=l;cur<=r;cur++){ (fr=N5
if(i1==mid+1) #B6f{D[pI
data[cur]=temp[i2++]; ]NI CQ9
else if(i2>r) W}2!~ep!
data[cur]=temp[i1++]; T9!NuKfur
else if(temp[i1] data[cur]=temp[i1++]; Z h9D^I
else c#`IF6qj
data[cur]=temp[i2++]; ?Yf v^DQ5
} md? cvGDE
} 2K o]Q_,~
A+frKoi
} D/ sYH0.V$
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改进后的归并排序: } XhL`%
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package org.rut.util.algorithm.support; <1Sj_HCT
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import org.rut.util.algorithm.SortUtil; Lccy~2v>
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/** W[qy4\.B
* @author treeroot V/#J>-os}W
* @since 2006-2-2 2<p@G#(
* @version 1.0 surNJ,)
*/ /'E[03I~
public class ImprovedMergeSort implements SortUtil.Sort { /DyeMCY-
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private static final int THRESHOLD = 10; nnN$?'%~6
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/* Zlh 2qq
* (non-Javadoc) kaiK1/W0;
* QRrAyRf[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |r,})o>
*/ Fw{#4
public void sort(int[] data) { "+Ys}t~2
int[] temp=new int[data.length]; 5#N<~
mergeSort(data,temp,0,data.length-1); )?{!7/H F@
} L(u@%.S
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private void mergeSort(int[] data, int[] temp, int l, int r) { &z5?]`ALu
int i, j, k; :t9![y[=|
int mid = (l + r) / 2; 83 R_8
if (l == r) im9EV|;
return; K@xMPB8in
if ((mid - l) >= THRESHOLD) lo'#dpt<
mergeSort(data, temp, l, mid); pX*E(Q)@!
else 3`{;E{
insertSort(data, l, mid - l + 1); He5y;5
if ((r - mid) > THRESHOLD) [OUV!o
mergeSort(data, temp, mid + 1, r); ';8 ,RTe
else +J;b3UE#
insertSort(data, mid + 1, r - mid); dTCLE t.
dY0W=,X$7T
for (i = l; i <= mid; i++) { 3+d^Bpp4
temp = data; <YEKbnw$o
} :AFU5mR4&
for (j = 1; j <= r - mid; j++) { s_RK x)w@
temp[r - j + 1] = data[j + mid]; N~IAm:G}[
} Ja4M@z
int a = temp[l]; &\~*%:C
int b = temp[r]; C9MK3vtD.
for (i = l, j = r, k = l; k <= r; k++) { &Ejhw3Nw
if (a < b) { 7kA+F+f
data[k] = temp[i++]; _Li.}g@Bd
a = temp; KWD{_h{R
} else { zDtC]y'
data[k] = temp[j--]; V#.pi zb
b = temp[j]; 2dKt}o>
} R[m{"2|,Lc
} yih|6sd$F
} 7G;1n0m-T
cT@| $A
/** Sw; kUJ
* @param data ):Z#!O<
* @param l `uk=2k}&m
* @param i :k`Qj(7S
*/ CMbID1M3
private void insertSort(int[] data, int start, int len) { R2{]R&wtn0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %g5#q64
} ;/wH/!b
} 6LCR ;~ ]
} mS;WNlm\
} D*VO;?D
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堆排序： dyf>T}Iy
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package org.rut.util.algorithm.support; L >"O[@
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import org.rut.util.algorithm.SortUtil; fH_l2b[-3@
d/Wp>A@dob
/** F;_o`h
* @author treeroot eAI|zk6
* @since 2006-2-2 [:(O`#
* @version 1.0 >7cj.%
*/ ]}l.*v\uK
public class HeapSort implements SortUtil.Sort{ T]1.":
*>zOWocxD
/* (non-Javadoc) <3N\OV2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U,T#{
*/ )G, S7A
public void sort(int[] data) { >d"\
MaxHeap h=new MaxHeap(); 5W|wDy
h.init(data); 3*j1v:x`
for(int i=0;i h.remove(); h:C:opa-=
System.arraycopy(h.queue,1,data,0,data.length); lf KV%
} NRP)'E
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private static class MaxHeap{ Gl3g.`X{$@
TxN+-< f
void init(int[] data){ |Thm5,ao
this.queue=new int[data.length+1]; hSAI G
for(int i=0;i queue[++size]=data; |9$C%@8
fixUp(size); l?m 3*
} + `'wY?
} `}uM91;
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private int size=0; d Efk~V\
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private int[] queue; 8::y5Yv]
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public int get() { l<S3<'&
return queue[1]; QKvaTy#
} fwzyCbks
A~k: m0MX
public void remove() { ^c.pvC"4j
SortUtil.swap(queue,1,size--); ;Z"Iv
fixDown(1); |pMP-
} =)i^E9
file://fixdown QFhyidm=]
private void fixDown(int k) { (=gqqOOl~
int j; ND=JpVkvZ?
while ((j = k << 1) <= size) { 7T!t*sSO'
if (j < size %26amp;%26amp; queue[j] j++; %'=TYvB 2
if (queue[k]>queue[j]) file://不用交换 yEJ3O^(F
break; eej#14&
SortUtil.swap(queue,j,k); GuL0:,
k = j; F>[^m Xw
} 7OXRR)]V
} A93(} V7I
private void fixUp(int k) { :(3'"^_NA
while (k > 1) { D0S^Msk9L
int j = k >> 1; oHSDi
if (queue[j]>queue[k]) 3w[uc~f
break; :c )R6=v
SortUtil.swap(queue,j,k); ?aTC+\=
k = j; U%VFr#
} xZV|QVY;
} a #p`l>rx
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} juM~X5b
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SortUtil： J]48th0,
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package org.rut.util.algorithm; *8%uXkMm
<FZ*'F*M
import org.rut.util.algorithm.support.BubbleSort; bsI?=lO
import org.rut.util.algorithm.support.HeapSort; }J\7IsM&
import org.rut.util.algorithm.support.ImprovedMergeSort; }>YEtA
import org.rut.util.algorithm.support.ImprovedQuickSort; R \y qM;2
import org.rut.util.algorithm.support.InsertSort; 5Go@1X]I
import org.rut.util.algorithm.support.MergeSort; H6$pA^
import org.rut.util.algorithm.support.QuickSort; md : Wx
import org.rut.util.algorithm.support.SelectionSort; !@+4&B=
import org.rut.util.algorithm.support.ShellSort; n4+^f~Y
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/** Di$++T8"
* @author treeroot Ac +fL
* @since 2006-2-2 brF) %x`
* @version 1.0 l]IQjjJ`
*/ [>QzT"=
public class SortUtil { -Zg@#H
public final static int INSERT = 1; S^i<_?nwg
public final static int BUBBLE = 2; x:]_z.5
public final static int SELECTION = 3; k)9 pkPl
public final static int SHELL = 4; 3|/zlKZz
public final static int QUICK = 5; i^}DIx{
public final static int IMPROVED_QUICK = 6; g9=O<u#
public final static int MERGE = 7; 7V~ gqum
public final static int IMPROVED_MERGE = 8; #CB`7}jq
public final static int HEAP = 9; `DP4u\6_
6:G::"ew
public static void sort(int[] data) { +/#Lm#*nu%
sort(data, IMPROVED_QUICK); jrYA5>=>#
} k]A$?C0Q<%
private static String[] name={ p;2NO&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M8FC-zFs
}; %i.;~>
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private static Sort[] impl=new Sort[]{ \!r,>P
new InsertSort(), _w9:([_
new BubbleSort(), 'd<1;Ayw
new SelectionSort(), "Za'K+4
new ShellSort(), w"E.Va
new QuickSort(), 0"c(n0L
new ImprovedQuickSort(), - I j
new MergeSort(), Jn1(-
new ImprovedMergeSort(), a0B,[i
new HeapSort() t^<ki?*
}; *Cx3bg*Gan
Eg]tDPN1
public static String toString(int algorithm){ 8lT2qqlr
return name[algorithm-1]; :x_;-
} V#d8fRm
roWg~U(S
public static void sort(int[] data, int algorithm) { X>s'_F?
impl[algorithm-1].sort(data); 1\if XJ
} Cn8w})B
jb!15Vlt"
public static interface Sort { 7@9R^,M4:
public void sort(int[] data); X&bnyo P
} L t.Vo
xw83dQ]}^
public static void swap(int[] data, int i, int j) { Bez 7
int temp = data; pU5t,
data = data[j]; 3Qoa?*
data[j] = temp; >=3ay^(Y2D
} B)(ZRH
} a*KJjl?k