[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; %6N)G!P
} C_-%*]*,j
int i1=l; ^K"ZJ6?+1
int i2=mid+1; Y}S.37|+^
for(int cur=l;cur<=r;cur++){ %uj[`
if(i1==mid+1) \FVNXUMU
data[cur]=temp[i2++]; =pyVn_dg
else if(i2>r) 3Fgz)*Gu]
data[cur]=temp[i1++]; ~};]k}
else if(temp[i1] data[cur]=temp[i1++]; K[e`t%2_
else [#IBYJ.6
data[cur]=temp[i2++]; ;4l-M2
} <>VIDE
} Bj; [
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} hr%U>U9F
]9#CVv[rq
改进后的归并排序: 1>hb-OMX
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package org.rut.util.algorithm.support; tc"T}huypU
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import org.rut.util.algorithm.SortUtil; 0T(O'v}.
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/** X{#bJ
* @author treeroot KuIkul9^%
* @since 2006-2-2 h|K\z{ A
* @version 1.0 Fs?( UM
*/ GahaZ F
public class ImprovedMergeSort implements SortUtil.Sort { " 98/HzR
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private static final int THRESHOLD = 10; :wFb5"
fdN45in=>
/* "&@gX_%
* (non-Javadoc) cLn;,u4
* )uANmThOz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _MGNKA6JI
*/ ;9}w|!/
public void sort(int[] data) { D% oueW
int[] temp=new int[data.length]; ,<7"K&
mergeSort(data,temp,0,data.length-1); [SK2x4
} ]gH wfqx
"(Mvl1^BT
private void mergeSort(int[] data, int[] temp, int l, int r) { joxS+P5#
int i, j, k; Tnf&pu#5
int mid = (l + r) / 2; MKV=m8G=
if (l == r) O'"YJ,
return; Ii|uGxEc
if ((mid - l) >= THRESHOLD) pTc$+Z73
mergeSort(data, temp, l, mid); {k kAqJ
else J>&[J!>r
insertSort(data, l, mid - l + 1); >Kz_My9
if ((r - mid) > THRESHOLD) !>CE(;E>z
mergeSort(data, temp, mid + 1, r); lq;
else =n> iQS
insertSort(data, mid + 1, r - mid); X7t5b7
-L+\y\F
for (i = l; i <= mid; i++) { _`TepX R
temp = data; y2oB]^z&n
} &r&;<Q
for (j = 1; j <= r - mid; j++) { X(4s;i
temp[r - j + 1] = data[j + mid]; K%98;e9
} pGO|~:E/L
int a = temp[l]; eV"dv*R
int b = temp[r]; l R:Ok8e
for (i = l, j = r, k = l; k <= r; k++) { ]ev*m&O
if (a < b) { D-'i G%)kA
data[k] = temp[i++]; N7d17c. 5
a = temp; 6XQ*:N/4al
} else { WAtg
data[k] = temp[j--]; 5oVLv4Z9u
b = temp[j]; %M|Z}2qv
} 8:Z@lp^
} KC&H*
} SNQz8(O
59&T/
/** ST[2]
* @param data 9zXu6<|qrL
* @param l ^</65+OT+
* @param i &{X{36
*/ b=6MFPbg
private void insertSort(int[] data, int start, int len) { SZCF3m&pz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aO~si=
} &p/S>qKu#
} :iP>z}h
} |pfhrwJp
} >t1_5
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堆排序： fG:PdIJ7_
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package org.rut.util.algorithm.support; .OVW4svX
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import org.rut.util.algorithm.SortUtil; FQ;4'B^k]
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/** 08<k'Oi]
* @author treeroot F{#N6,T
* @since 2006-2-2 5*s1qA0^
* @version 1.0 +)/Rql(lY
*/ h Jfa_
public class HeapSort implements SortUtil.Sort{ (|yRo
}*fW!(*
/* (non-Javadoc) W?*Xy6",JF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dzjBUD
*/ V_)5Af3wY
public void sort(int[] data) { U%mkhWn
MaxHeap h=new MaxHeap(); >P6^k!R1y
h.init(data); &{-oA_@
for(int i=0;i h.remove(); 5~_eN
System.arraycopy(h.queue,1,data,0,data.length); t9Enk!@
} ;n(#b8r9
`jD8(}_
private static class MaxHeap{ |<|28~#
nx!qCgo
void init(int[] data){ 8ktjDs$=.:
this.queue=new int[data.length+1]; nUI63?
for(int i=0;i queue[++size]=data; #~bU}[{
fixUp(size); EIq{C-(
} KKeb ioW
} b xk'a,!S
E5,%J
private int size=0; f7EIDFX>pt
>,w\lf9
private int[] queue; lKh2LY=j
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public int get() { F]K$u<U
return queue[1]; p`E|SNt/W
} ,_"7|z wb
I2t-D1X
public void remove() { )1ZJ
SortUtil.swap(queue,1,size--); nhVK?
fixDown(1); [M7iJcwt
} (c|$+B^*
file://fixdown yiv RpSL
private void fixDown(int k) { mr{k>Un\
int j; x*,q Rew
while ((j = k << 1) <= size) { ()JYN5
if (j < size %26amp;%26amp; queue[j] j++; ])Q9=?Sd}
if (queue[k]>queue[j]) file://不用交换 ND9n1WZ&x
break; sUyCAKebRr
SortUtil.swap(queue,j,k); `'G),{ j
k = j; 8 7|8eU2:k
} E i\J9zt
} gqO%^b)6
private void fixUp(int k) { )M&Azbu
while (k > 1) { )9A<fwpN
int j = k >> 1; :w {M6mM>
if (queue[j]>queue[k]) {Gk}3u/
break; . T6_N
SortUtil.swap(queue,j,k); 9:CVN@E
k = j; c"%_]7
} i h`y0(<
} ?FY@fO?es
T;:',T[G
} 7N}\1Di5
n7`.<*:
} 5fvUv"m
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SortUtil： WRLu3nBx
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package org.rut.util.algorithm; lk+=26>
d 40'3]/{
import org.rut.util.algorithm.support.BubbleSort; @ @3)D%h
import org.rut.util.algorithm.support.HeapSort; lvz:UWo
import org.rut.util.algorithm.support.ImprovedMergeSort; U47k5s(J
import org.rut.util.algorithm.support.ImprovedQuickSort; :nbW.B3GV
import org.rut.util.algorithm.support.InsertSort; HkfSx rTgQ
import org.rut.util.algorithm.support.MergeSort; GH; F3s
import org.rut.util.algorithm.support.QuickSort; ]mO+<{{4X
import org.rut.util.algorithm.support.SelectionSort; +NzD/.gq
import org.rut.util.algorithm.support.ShellSort; L3G)?rPFC#
RqX4ep5j
/** bb O;AiHD
* @author treeroot 93Ci$#<y
* @since 2006-2-2 h>L6{d1
* @version 1.0 .2(@jx,[
*/ >ihe|WN
public class SortUtil { kGBl)0pr`x
public final static int INSERT = 1; 66"ZH,335
public final static int BUBBLE = 2; 9%)& }KK|
public final static int SELECTION = 3; @=<TA0;LL
public final static int SHELL = 4; 2)I'5?I
public final static int QUICK = 5; G.q^Zd#.T
public final static int IMPROVED_QUICK = 6; C(%5,|6
public final static int MERGE = 7; M;RnH##W
public final static int IMPROVED_MERGE = 8; n4r( Vg1GS
public final static int HEAP = 9; )Ido|!]0d
%BYlbEx
public static void sort(int[] data) { cnUU1Uz>
sort(data, IMPROVED_QUICK); 82@;.%
} {If2[4!z
private static String[] name={ ae(]9VW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xz+`]Q
}; $qyM X[
nO.+&kA
private static Sort[] impl=new Sort[]{ &<#BsFz
new InsertSort(), y3o4%K8
new BubbleSort(), t+)GB=C
new SelectionSort(), @Qsg.9N3K
new ShellSort(), 9:Z~}yX
new QuickSort(), ;|$]Qq
new ImprovedQuickSort(), YDzF( ']o:
new MergeSort(), XY t8vJ
new ImprovedMergeSort(), ;Q,).@<C
new HeapSort() @okm@6J*X
}; m{yNnJ3O
_ L:w;Oy9T
public static String toString(int algorithm){ w-Q 6 -
return name[algorithm-1]; \3Ald.EqtM
} ?KuJs9SM
[\M?8R$)
public static void sort(int[] data, int algorithm) { q2U"k
impl[algorithm-1].sort(data); <!HDtN
} +&zuI
b yreleWo
public static interface Sort { BRok 89
public void sort(int[] data); H><mcah
} au}0PnA;
u$/2XO
public static void swap(int[] data, int i, int j) { ib=^tK
int temp = data; {8p?we3l1
data = data[j]; PH4bM
data[j] = temp; Qs[EA_
} om39;nk!}
} e=Tc(Mwn