[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; k!6wVJ|_Y
} :ift{XR'
int i1=l; SgocHpyg
int i2=mid+1; {,rVA(I@
for(int cur=l;cur<=r;cur++){ =1Mh%/y
if(i1==mid+1) Dx<CO1%z-
data[cur]=temp[i2++]; S\O6B1<:
else if(i2>r) ^~%zPlv
data[cur]=temp[i1++]; /K]<7
else if(temp[i1] data[cur]=temp[i1++]; (j;6}@
else L E>A|M$X
data[cur]=temp[i2++]; +e%U6&l{
} saaN$tU7
} .\>I-
enGjom
} qSWnv`hL
?"[h P=3J
改进后的归并排序: cQMb+Q2Yw
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package org.rut.util.algorithm.support; Qm X(s
4W''j[Y/
import org.rut.util.algorithm.SortUtil; Ya)s_Zr7
;9R;D,Gk!
/** %CP:rAd`M.
* @author treeroot )R2BTE:
* @since 2006-2-2 WwF4`kxT
* @version 1.0 Gq/f|43}@O
*/ 6DG:imGl
public class ImprovedMergeSort implements SortUtil.Sort { bvMa|;f1
=wW3Tr7~
private static final int THRESHOLD = 10; I!ykm\<
f:h.O# d>
/* v@0lTl_
* (non-Javadoc) kgvB80$4
* zW_V)UNe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0}UJP
*/ Tej-mr3P
public void sort(int[] data) { [~ sXjaL8
int[] temp=new int[data.length]; >k?/'R
mergeSort(data,temp,0,data.length-1); P/'~&*m-
} bV#U&)|
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private void mergeSort(int[] data, int[] temp, int l, int r) { :A,V<Es}I"
int i, j, k; 6.Nu[-?
int mid = (l + r) / 2; -k p~pe*T
if (l == r) lMX 2O2 o
return; nL+*-R!R
if ((mid - l) >= THRESHOLD) nz|;6?LCLY
mergeSort(data, temp, l, mid); aPq9^S*
else +b.qzgH>r
insertSort(data, l, mid - l + 1); IPU'M*|Q
if ((r - mid) > THRESHOLD) 0(|BQ'4~H
mergeSort(data, temp, mid + 1, r); `CI9~h@k
else u:pdY'`"#
insertSort(data, mid + 1, r - mid); dUtxG ~9
*Rv eR?kO
for (i = l; i <= mid; i++) { 0KyujU?sF
temp = data; x-0IxWD%
} r3l}I6
for (j = 1; j <= r - mid; j++) { #dDsI]E)
temp[r - j + 1] = data[j + mid]; AF1";duA
} 2hV#3i
int a = temp[l]; &+-ZXN
int b = temp[r]; )EYsqj
for (i = l, j = r, k = l; k <= r; k++) { \^kyC1
if (a < b) { t@1e9uR
data[k] = temp[i++]; ;^:9huN
a = temp; #D3e\(
} else { +(5H$O{h
data[k] = temp[j--]; i+yqsYKO
b = temp[j]; v#.FK:u}
} pr\yc
} ^Ois]#py
} |EaGKC(
>U^AIaW
/** Tk9*@kqv
* @param data ](NSpU|*
* @param l [UquI "
* @param i x{u_kepv[k
*/ |v8>22y
private void insertSort(int[] data, int start, int len) { a J[VX)"J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k+44ud.j
} /a6\G.C5
} c6s*u%+},
} ;)[RG\
} RMDs~
a=gTGG"9
堆排序： 7|T<dfQk
Giz9jzF\
package org.rut.util.algorithm.support; kR6rf_-[
gE JmMh
import org.rut.util.algorithm.SortUtil; 4pkc9\
&qFdP'E;$
/** oo3ZYA
* @author treeroot A,MRK#1u
* @since 2006-2-2 @g[p>t> *
* @version 1.0 7*OO k"9
*/ `8\pihww
public class HeapSort implements SortUtil.Sort{ ?AyG!F
W+a>*#*
/* (non-Javadoc) A2Rr*e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q <^'v>~n
*/ ;7 i0ko9
public void sort(int[] data) { 1@E<5rp o
MaxHeap h=new MaxHeap(); X6!u(plVQ
h.init(data); q>r9ooN
for(int i=0;i h.remove(); Pp:(PoH
System.arraycopy(h.queue,1,data,0,data.length); :cG_aOkid
} }{:H0)H*
/`D]m?
private static class MaxHeap{ xx nW1`]
e<l Wel
void init(int[] data){ 9Z6] ];8E
this.queue=new int[data.length+1]; E92dSLhs5
for(int i=0;i queue[++size]=data; mR[J Xh9s
fixUp(size); C$aiOK-]+
} nmc=RK^cM
} eek5Xm
QZ"Lh
private int size=0; Q)C#)|S
Sq UoXNw
private int[] queue; Bb]pUb
P00d#6hPJ
public int get() { QSAz:Yvf|
return queue[1]; Bg"b,&/^u
} t}qoIxy)
j?+FS`a!
public void remove() { '+Gt+Gq+
SortUtil.swap(queue,1,size--); aQMET~A:
fixDown(1); b3H~a2"d
} =JOupw
file://fixdown WA8Qt\Q
private void fixDown(int k) { CP|N2rb
int j; tKo^A:M
while ((j = k << 1) <= size) { ZJ 8~f
if (j < size %26amp;%26amp; queue[j] j++; MH?|>6
if (queue[k]>queue[j]) file://不用交换 rV"<1y:g
break; zr\I1v]?1#
SortUtil.swap(queue,j,k); 6*S|$lo9B
k = j; VDx=Tsu-
} Dvo.yn|kB
} bb$1RLyRL
private void fixUp(int k) { 9&g//JlD
while (k > 1) { tcwE.>5O
int j = k >> 1; s)_7*DY
if (queue[j]>queue[k]) xQ* U9Wt;T
break; hc"+6xc
SortUtil.swap(queue,j,k); x5WFPY$wM
k = j; ?2 u_E "
} z=N'evx~
} gPT-zul
G=jdb@V/?
} 8,a&i:C
bguhx3s
} zM|d9TS
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SortUtil： ^a[7qX_B
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package org.rut.util.algorithm; (VO) Q
R KFz6t
import org.rut.util.algorithm.support.BubbleSort; '8 1M%KO
import org.rut.util.algorithm.support.HeapSort; o`+6E q0w
import org.rut.util.algorithm.support.ImprovedMergeSort; #@;RJJZg
import org.rut.util.algorithm.support.ImprovedQuickSort; (i.MxGDd
import org.rut.util.algorithm.support.InsertSort; >e/;
import org.rut.util.algorithm.support.MergeSort; m[LIM}Gu
import org.rut.util.algorithm.support.QuickSort; `5r*4N<
import org.rut.util.algorithm.support.SelectionSort; 0<>I\UN0b
import org.rut.util.algorithm.support.ShellSort; |<\o%89AM
HN7(-ml=B
/** k v,'9z
* @author treeroot J|W~\(W6i
* @since 2006-2-2 K,&)\r kzD
* @version 1.0 Y1rU
*/ `l9Pk\X[
public class SortUtil { 8+k\0fmy
public final static int INSERT = 1; Dq)V] Zx
public final static int BUBBLE = 2; :2^%^3+V
public final static int SELECTION = 3; c+f~>AaI
public final static int SHELL = 4; we4e>)
public final static int QUICK = 5; ~%qHJ4C
public final static int IMPROVED_QUICK = 6; $z1u>{
public final static int MERGE = 7; >)R7*^m{'
public final static int IMPROVED_MERGE = 8; }y(1mzb
public final static int HEAP = 9; p(8H[L4Y
%C" wUAY
public static void sort(int[] data) { t.t$6+"5We
sort(data, IMPROVED_QUICK); T\:Vu{|
} |#D3~au
private static String[] name={ "o*(i7T=n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `{c %d
}; a9j f7r1
Zgkk%3'^'
private static Sort[] impl=new Sort[]{ "a6[FqTs
new InsertSort(), .}&bE1
new BubbleSort(), hk3}}jc
new SelectionSort(), iOkRB[hi
new ShellSort(), 0UB)FK,9
new QuickSort(), 8L`J](y
new ImprovedQuickSort(), qZ'&zB)
new MergeSort(), gXZC%S
new ImprovedMergeSort(), H5'/i;
new HeapSort() QFY1@2EC
}; $ jWe!]ASU
KhIg
public static String toString(int algorithm){ dYrw&gn
return name[algorithm-1]; eU&[^
} L:nZ_O;
V|e9G,z~A
public static void sort(int[] data, int algorithm) { y!&6"l$K]
impl[algorithm-1].sort(data); ~~!iDF\
} u|&"l
J,Du:|3o
public static interface Sort { M>nplHq
public void sort(int[] data); Q'/v-bd?o
} a'u:1C^\
Clr~:2g\
public static void swap(int[] data, int i, int j) { Yj)H!Cp.xD
int temp = data; :c[iS~ ~Y
data = data[j]; U2m86@E
data[j] = temp; aMKi`EW
} EVZuwbO)|
} ! eXDN