[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; >R]M:Wx
} O>pX(DS L
int i1=l; 4@fv%LOQo
int i2=mid+1; _N|%i J5
for(int cur=l;cur<=r;cur++){ Ga02Zk
if(i1==mid+1) #<[&Lw
data[cur]=temp[i2++]; W{'hn&vU
else if(i2>r) R]%"YQ V
data[cur]=temp[i1++]; 7P3pjgh
else if(temp[i1] data[cur]=temp[i1++]; l,h`YIy
else W>a}g[Ad
data[cur]=temp[i2++]; }~zDcj_
} )/'WboL
} n-8/CBEH(
%z@ Z^Jv
} N,qo/At}R[
w~v6=^
改进后的归并排序: qzNb\y9G
})^eaLBR4
package org.rut.util.algorithm.support; 5]I)qij q
' F.^ 8/>
import org.rut.util.algorithm.SortUtil; ;=0mL,
W;I{4ed6
/** F_:zR,P%#
* @author treeroot X,VI5$
* @since 2006-2-2 (n7xYGfYS
* @version 1.0 8%B_nVc
*/ *:TwO=)
public class ImprovedMergeSort implements SortUtil.Sort { 4!{lySW
;iX~3[]
private static final int THRESHOLD = 10; B,%6sa~I
2fr%_GNu
/* *$%~/Q@]
* (non-Javadoc) *d=}HO/
* $,by!w'e:l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rd0Fd+t/
*/ vVo'f|fW
public void sort(int[] data) { ^/E'Rf3[A
int[] temp=new int[data.length]; ^AU-hVj
mergeSort(data,temp,0,data.length-1); *O'|NQhNx>
} b>p_w%d[[J
$7AsMlq[(
private void mergeSort(int[] data, int[] temp, int l, int r) { THQ #zQ-
int i, j, k; DDR4h"Y
int mid = (l + r) / 2; 3@x[M?$
if (l == r) L@T/4e./
return; Kt*b) <
if ((mid - l) >= THRESHOLD) HcIJ&".~
mergeSort(data, temp, l, mid); A)9]^@,
else ]pe7I P
insertSort(data, l, mid - l + 1); wnd #J `
if ((r - mid) > THRESHOLD) @>46.V{P}B
mergeSort(data, temp, mid + 1, r); 6w &<j&V
else D+uo gRS61
insertSort(data, mid + 1, r - mid); v[uVAbfQ
V.`hk^V,
for (i = l; i <= mid; i++) { J&\Q3_vro9
temp = data; jGo%Aase
} ! N2uJ?t
for (j = 1; j <= r - mid; j++) { aB~k8]q.
temp[r - j + 1] = data[j + mid]; m,+PYq
} =I'iD0eR
int a = temp[l]; I>.pkf<V
int b = temp[r]; Td|,3 n
for (i = l, j = r, k = l; k <= r; k++) { BEb?jRMjLg
if (a < b) { Xxh^4vKjX
data[k] = temp[i++]; Awfd0L;9
a = temp; =Ks&m4
} else { UNb7WN
data[k] = temp[j--]; UeCi{W
b = temp[j]; JzN "o'
} -x6_HibbD
} [x7Rq_^
} gnN>Rl 5_
!U@ETo
/** U3Gg:onuE
* @param data [\Wl~ a l
* @param l I_f%%N%
* @param i Zex~ $r
*/ g0biw?
private void insertSort(int[] data, int start, int len) { fsOlg9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PtuRXx
} BDfMFH[1
} 90+Vw`Gz=
} /'{vDxZf R
} <fBJ@>
r+%3Y:dZE
堆排序： =AaF$R
JQbaD-
package org.rut.util.algorithm.support; Nt\07*`qCr
-]KgLgJ
import org.rut.util.algorithm.SortUtil; 4Wz1O$*
pSQ2wjps
/** 5u9lKno
* @author treeroot c(Y~5A{TXO
* @since 2006-2-2 m %+'St|qr
* @version 1.0 :1f,%Z$,q
*/ 4IZAJqw(*
public class HeapSort implements SortUtil.Sort{ _s#J\!F
@dK_w'W
/* (non-Javadoc) lW-G]V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TVvE0y(9
*/ 'g<{l&u
public void sort(int[] data) { [r7Hcb
MaxHeap h=new MaxHeap(); .6[8$8c
h.init(data); .sit5BX
for(int i=0;i h.remove(); nl2Lqu1
System.arraycopy(h.queue,1,data,0,data.length); +~F>:v?Rh
} #"A`:bjG
5);"()g32
private static class MaxHeap{ IW nG@!
iDDq<a.A
void init(int[] data){ >j]Gz-wC
this.queue=new int[data.length+1]; vRaxB
for(int i=0;i queue[++size]=data; ozS'n]8*
fixUp(size); S`[(y?OF?
} &'e+`\
} aO |@w"p8
=4x6v<
private int size=0; uh9b!8
V 7~9z\lW
private int[] queue; z I9jxwXU
ysp,:)-%G@
public int get() { fMf;
return queue[1]; s3ASA.*
} bp8sZK"z
(Q `Ps/
public void remove() { x^[0UA]S9
SortUtil.swap(queue,1,size--); 9BOn8p;yz
fixDown(1); p79QEIbk=
} (@T{ [\
file://fixdown 5R.jhYAj
private void fixDown(int k) { Ro$*bN6p
int j; G1X73qoHT<
while ((j = k << 1) <= size) { )qX.!&|I
if (j < size %26amp;%26amp; queue[j] j++; lgt&kdc%o
if (queue[k]>queue[j]) file://不用交换 &9v8
break; Q!-"5PX
SortUtil.swap(queue,j,k); yWc%z6dXC
k = j; Pt-mLINvG
} ?:GrM!kq76
} :L:] 3L
private void fixUp(int k) { &>.QDO
while (k > 1) { :O,,fJ<x.O
int j = k >> 1; uUBUUr
if (queue[j]>queue[k]) WM$Z?CN%KB
break; H,;ZFg/v8
SortUtil.swap(queue,j,k); n~>b}DY
k = j; -H\j-k
} 9nO&d(r g
} hms Aim9i
mOjjw_3gq
} `K$;K8!1
&j'k9C2p
} kMzDmgoxNg
* kL>9
SortUtil： k_^ 4NU
p8s%bPjK
package org.rut.util.algorithm; }7%ol&<@
[r]<~$
import org.rut.util.algorithm.support.BubbleSort; pR*3Q@Ng
import org.rut.util.algorithm.support.HeapSort; Bd>ATc+580
import org.rut.util.algorithm.support.ImprovedMergeSort; o=5hG9dj
import org.rut.util.algorithm.support.ImprovedQuickSort; 6>)KiigZ\
import org.rut.util.algorithm.support.InsertSort; &QHmo*
import org.rut.util.algorithm.support.MergeSort; TgRG6?#^l
import org.rut.util.algorithm.support.QuickSort; Ak`?,*LM
import org.rut.util.algorithm.support.SelectionSort; Q[`2?j?
import org.rut.util.algorithm.support.ShellSort; TFbF^Kd#:d
C]zgVbu
/** uuUjIZCtz
* @author treeroot 7 oYD;li$k
* @since 2006-2-2 Sxy3cv53
* @version 1.0 (/> yfL]J
*/ {c1wJ
public class SortUtil { Ym]rG 4
public final static int INSERT = 1; !"08TCc<
public final static int BUBBLE = 2; guy!/zQ>A
public final static int SELECTION = 3; @[/!e`]+
public final static int SHELL = 4; %<q"&]e,
public final static int QUICK = 5; sdewz(xskj
public final static int IMPROVED_QUICK = 6; v<0S@9~
public final static int MERGE = 7; +tlbO?
public final static int IMPROVED_MERGE = 8; nu|?F\o!
public final static int HEAP = 9; >NpW$P{'
@6U&7!
public static void sort(int[] data) { 8,CL>*A
sort(data, IMPROVED_QUICK); 0eCjK.
} v!mP9c j
private static String[] name={ phwq#AxQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -42 U
}; lvk*Db$
4uVyf^f\]f
private static Sort[] impl=new Sort[]{ Eh`W J~
new InsertSort(), M9yqJPS}B
new BubbleSort(), FzBny[F
new SelectionSort(), ,b+Hy`t
new ShellSort(), ,5sv;
new QuickSort(), {5fq4AA6
new ImprovedQuickSort(), noT}NX%
new MergeSort(), iVqF]2>
new ImprovedMergeSort(), a}Jy o!.
new HeapSort() KA`)dMWL
}; wp/x|AV
P}PMRAek
public static String toString(int algorithm){ 2[Qzx%Vp
return name[algorithm-1]; F<6{$YI
} (ubK i[)
A_6Dol=J@
public static void sort(int[] data, int algorithm) { +A_jm!tJS(
impl[algorithm-1].sort(data); 1@<>GDB9
} B7'2@+(
/hyCR___
public static interface Sort { Ga*
public void sort(int[] data); URTJA<r8D
} 61TL]S8
6z67%U*8r
public static void swap(int[] data, int i, int j) { jm|zn
int temp = data; Rn whkb&&
data = data[j]; y+VRD
data[j] = temp; k#@)gL
} %bnjK#o"Q
} C2%Yry