[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; \3Ys8umKq
} J=5G<
int i1=l; (',G Ako
int i2=mid+1; W.{#Pg1Da
for(int cur=l;cur<=r;cur++){ Sw>AgES
if(i1==mid+1) zAS&L%^tV
data[cur]=temp[i2++]; Gb\}e}TB[
else if(i2>r) ^<7)w2ns
data[cur]=temp[i1++]; {6*h';~
else if(temp[i1] data[cur]=temp[i1++]; %/jmQ6z^
else Fod2KS;g
data[cur]=temp[i2++]; Jy{A1i@4~s
} 5YJLR;
} Lr_+)l
=]E;wWC
} j?#S M!f
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改进后的归并排序: c(i-~_
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package org.rut.util.algorithm.support; dyD=R
%#Fd0L
import org.rut.util.algorithm.SortUtil; Y<I/y
:^%My]>T
/** 0; M+8
* @author treeroot Kmk<
* @since 2006-2-2 JmtU>2z\
* @version 1.0 j8YMod=
*/ K>"M#T
public class ImprovedMergeSort implements SortUtil.Sort { \,oT(p4N%M
x4Y+?2
private static final int THRESHOLD = 10; C 3b
?&j[Rj0pH
/* JstX# z
* (non-Javadoc) 6uOR0L
* 0'%R@|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [_#9PH33
*/ k5P&F
public void sort(int[] data) { Kw+?Lowp
int[] temp=new int[data.length]; W1iKn
mergeSort(data,temp,0,data.length-1); IX,/ZOZ|
} <$K%u?
;spuBA)[X
private void mergeSort(int[] data, int[] temp, int l, int r) { [89#8|+
int i, j, k; eOE7A'X
int mid = (l + r) / 2; A!x_R {,yH
if (l == r) NyFa2Ihd
return; 7_?:R2]n
if ((mid - l) >= THRESHOLD) TY],H=
mergeSort(data, temp, l, mid); Nj@k|_1
else (G*--+Gn
insertSort(data, l, mid - l + 1); gQCkoQi:j
if ((r - mid) > THRESHOLD) h1:uTrtA
mergeSort(data, temp, mid + 1, r); <U (gjX
else +MIDq{B
insertSort(data, mid + 1, r - mid); 3W5|Y@0
0bVtku K;G
for (i = l; i <= mid; i++) { FDkRfhK
temp = data; nxA Y]Q
} Z;P[)q
for (j = 1; j <= r - mid; j++) { b,cA mZ
temp[r - j + 1] = data[j + mid]; 'RC(ss1G
} =;9Wh!{
int a = temp[l]; Y7zg
int b = temp[r]; Nc,"wA
for (i = l, j = r, k = l; k <= r; k++) { 2kp.Ljt@
if (a < b) { kVCSFF*
data[k] = temp[i++]; |[)t4A"}
a = temp; =hH>]$J[
} else { kS%FV;9>(
data[k] = temp[j--]; I QS|
b = temp[j]; lc,{0$ 1<
} ={o>g'
} s=! y%
} <=l!~~%
qH: ` O%,
/** \f}S Hh
* @param data &HNJ'
* @param l 4/&Us
* @param i A|,\}9)4X[
*/ ce0TQ
private void insertSort(int[] data, int start, int len) { nw+L _b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $6Lgaz
} hc4<`W{
} b'pbf
} RFU(wek
} YR@@:n'TP
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堆排序： ;EP7q[
d+[yW7%J
package org.rut.util.algorithm.support; ;]D@KxO$dJ
Py^F},?J
import org.rut.util.algorithm.SortUtil; +y!dU{L^
iW(HOsA
/** sU^2I v\%
* @author treeroot M`*B/Fh2
* @since 2006-2-2 KdHR.;*
* @version 1.0 r :{2}nE
*/ ClCb.Ozj4
public class HeapSort implements SortUtil.Sort{ ID &Iz
2`Ub;Nn29
/* (non-Javadoc) ZSuUmCm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MUh)
*/ :DXkAb2
public void sort(int[] data) { +AhR7R!
MaxHeap h=new MaxHeap(); ]tA39JK-i
h.init(data); 1mm/Ssw:C
for(int i=0;i h.remove(); OmQSNU.our
System.arraycopy(h.queue,1,data,0,data.length); pk%I98! Jy
} ,%w_E[2
@Ck6s
private static class MaxHeap{ wj!p6D;;S
#O6SEK|Z
void init(int[] data){ nyWA(%N1
this.queue=new int[data.length+1]; qL091P\F
for(int i=0;i queue[++size]=data; d8`^;T ;}d
fixUp(size); [cwc}f^
} Oh9wBV
} _iLXs
^n!{ vHz
private int size=0; iJv4%|9
b#(SDNo6
private int[] queue; [yM{A<\L
'g$~ij ;x
public int get() { Q:&,8h[
return queue[1]; ~Z!xS
} <6Q]FH!6
|}b~ss^
public void remove() { H0Qpc<Z4/
SortUtil.swap(queue,1,size--); pg1o@^OuL
fixDown(1); MNzq,/Wf
} Vy.A`Hz
file://fixdown gV1&b (h
private void fixDown(int k) { 4-^|e
int j; ;2q;RT`h
while ((j = k << 1) <= size) { M p:c.
if (j < size %26amp;%26amp; queue[j] j++; M8X*fYn
if (queue[k]>queue[j]) file://不用交换 /tM<ois*
break; K++pH~o
SortUtil.swap(queue,j,k); $,otW2:)
k = j; t_6sDr'.
} `e .;P
} ^)<>5.%1''
private void fixUp(int k) { &&4av*\I
while (k > 1) { zYO+;;*@
int j = k >> 1; E]WammX c
if (queue[j]>queue[k]) N3g[,BE
break; _m;0%]+
SortUtil.swap(queue,j,k); EKZ40z`
k = j; ?vPwI
} EgM.wQHR]
} +Gqh
yx"xbCc#
} )28Jz6.I
q4@n pbx
} kU$P?RD
1,=U^W.G
SortUtil： hV#+joT8i
<Z{\3X^
package org.rut.util.algorithm; }WS%nQA
)` -b\8uw
import org.rut.util.algorithm.support.BubbleSort; ^Crl~~Gk`
import org.rut.util.algorithm.support.HeapSort; ,uqSq
import org.rut.util.algorithm.support.ImprovedMergeSort; AX}l~ sv
import org.rut.util.algorithm.support.ImprovedQuickSort; zk=5uKcPE
import org.rut.util.algorithm.support.InsertSort; 9#{?*c6
import org.rut.util.algorithm.support.MergeSort; p/>}{Q )Y
import org.rut.util.algorithm.support.QuickSort; wcUf?`21,
import org.rut.util.algorithm.support.SelectionSort; H>AQlO+J
import org.rut.util.algorithm.support.ShellSort; CT+pkNC
jJdw\`
/** 7].tt
* @author treeroot a97A{7I&
* @since 2006-2-2 [_*%
* @version 1.0 YqX/7b+
*/ VFz(U)._
public class SortUtil { 2#~5[PtP^
public final static int INSERT = 1; z #c)Q
public final static int BUBBLE = 2; 3ddH@Y|
public final static int SELECTION = 3; .>DqdtP[
public final static int SHELL = 4; yz8ZY,9
public final static int QUICK = 5; L3iYZ>]
public final static int IMPROVED_QUICK = 6; "^VKs_U8o
public final static int MERGE = 7; %myg67u
public final static int IMPROVED_MERGE = 8; jjL(=n<J<"
public final static int HEAP = 9; +Rn]6}5m\
w^e<p~i!^E
public static void sort(int[] data) { b/cc\d<
sort(data, IMPROVED_QUICK); b7Jk{x #u
} qFp }+s
private static String[] name={ (|L0s)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8X!^ 2B}J
}; Zy _A3m{
g0GCg
private static Sort[] impl=new Sort[]{ j:B?0~=
new InsertSort(), x~C%Hp*#
new BubbleSort(), YA9Xe+g
new SelectionSort(), .vYU4g]
new ShellSort(), ^+tAgK2
new QuickSort(), s9svuFb
new ImprovedQuickSort(), ~K]5`(KV
new MergeSort(), z[Xs=S!]I
new ImprovedMergeSort(), E9TWLB5A)(
new HeapSort() ?ORG<11a
}; ^55#!/9
}/q]:3M|
public static String toString(int algorithm){ ~c~N _b
return name[algorithm-1]; *>,8+S33r{
} .)~IoIW=
URS6 LM
public static void sort(int[] data, int algorithm) { p9rnhqH6
impl[algorithm-1].sort(data); I!3qb-.Q
} #8iRWm0*6
"4"gHs
public static interface Sort { d?^bCf+<
public void sort(int[] data); {eA0I\c(C
} '1{co/Y
*m6~x-x
public static void swap(int[] data, int i, int j) { oG~a`9N%C
int temp = data; hw]x T5
data = data[j]; eFS;+?bu
data[j] = temp; =EwC6+8*M
} H"lq!C`
} kSoa'