[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; G0x!:[
} '[[*(4a3
int i1=l; 7{ QjE
int i2=mid+1; V%J_iY/BUb
for(int cur=l;cur<=r;cur++){ #w)D ml
if(i1==mid+1) O'W[/\A56M
data[cur]=temp[i2++]; 2fdC @V
else if(i2>r) 0av2w5>af
data[cur]=temp[i1++]; yrrP#F
else if(temp[i1] data[cur]=temp[i1++]; Y2y = P
else ]i'gU(+;`
data[cur]=temp[i2++]; I%ZSh]On
} M0RVEhX
} BH?fFe&J:`
K%>3ev=y.s
} 1f5;^T I
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改进后的归并排序: 4=hz4(5a
YR68'Sft[
package org.rut.util.algorithm.support; s#)tiCSVW
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import org.rut.util.algorithm.SortUtil; ot,e?lF
Jb`yK@x
/** k.#[h@Pm
* @author treeroot 6b=7{nLF
* @since 2006-2-2 >zcp(M98
* @version 1.0 ,6^V)F
*/ ]4-t*Em
public class ImprovedMergeSort implements SortUtil.Sort { ~2U5Wt
)%(H'omvl
private static final int THRESHOLD = 10; NE!]
uB3Yl=P
/* n'Z5rXg
* (non-Javadoc) --|L?-2k,
* ]Y6y ]u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'xc=N
*/ o7s<G8;?
public void sort(int[] data) { 4ew#@
int[] temp=new int[data.length]; v@]\ P<E
mergeSort(data,temp,0,data.length-1); QU^?a~r
} w<=-n;2
AU H_~SY
private void mergeSort(int[] data, int[] temp, int l, int r) { MG0d&[
int i, j, k; ^o6&|q
int mid = (l + r) / 2; ,[ M^rv
if (l == r) e5.sqft
return; FKu^{'Y6E0
if ((mid - l) >= THRESHOLD) 1FmqNf:V7I
mergeSort(data, temp, l, mid); ST^{?Q
else o^&nkR
insertSort(data, l, mid - l + 1); 6ALUd^
if ((r - mid) > THRESHOLD) AG<TY<nqL
mergeSort(data, temp, mid + 1, r); '9q:gFO
else |th"ET
insertSort(data, mid + 1, r - mid); 's6hCs&|NV
:jioF{,
for (i = l; i <= mid; i++) { AoN|&o
temp = data; ?$rHyI
} Lk]/{t0
for (j = 1; j <= r - mid; j++) { 0@PI=JZ%
temp[r - j + 1] = data[j + mid]; fIg~[VN"
} BpZ17"\z
int a = temp[l]; @k,}>Tk
int b = temp[r]; A**PGy.Ni
for (i = l, j = r, k = l; k <= r; k++) { I=Xj;\b
if (a < b) { d7Devs k
data[k] = temp[i++]; =OF]xpI'&a
a = temp; 0w ] pDj
} else { D<XRu4^;
data[k] = temp[j--]; y5lhmbl: e
b = temp[j]; !7fVO2m T
} 9Kd:7@U
} s~MCt|a
} qz/d6-0"
K yFR;.F-
/** B< BS>(Nr>
* @param data 14;lB.$p
* @param l Wc-8j2M
* @param i XP!7@:
*/ y@Q? guB
private void insertSort(int[] data, int start, int len) { naB`@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0ud>oh4WPR
} 04cNi~@m
} _q dLA
} 2 VGGSLr
} %G>V .d
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堆排序： U/I+A|S[
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package org.rut.util.algorithm.support; qJrMr4:F
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import org.rut.util.algorithm.SortUtil; PFnq:G^L
qQ "O;_
/** 4Gm(P~N
* @author treeroot N:Zf4
* @since 2006-2-2 gR:21*&cz
* @version 1.0 |Zrkk>GW:
*/ R~&i8n.
public class HeapSort implements SortUtil.Sort{ -6u#:pVpU
/*yPy?
/* (non-Javadoc) Rk.GrLp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vswBK-w(Z
*/ [v$NxmRu
public void sort(int[] data) { D&r2k 9
MaxHeap h=new MaxHeap(); J=qPc}+
h.init(data); bP,_H
for(int i=0;i h.remove(); %!e;sL~&
System.arraycopy(h.queue,1,data,0,data.length); PC}m.tE
} SQd`xbIuL
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private static class MaxHeap{ z7P]g C$\
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void init(int[] data){ Rr>h8Ni <
this.queue=new int[data.length+1]; hPHrq{YZ
for(int i=0;i queue[++size]=data; Du2v,n5@
fixUp(size); d~b#dcv$"
} vAMr&[
} jL[ hB
J6Q}a7I#
private int size=0; $"&U%3
aY7.<p*a
private int[] queue; H;OPA8\n
f:-dw6a=s
public int get() { U\Hd?&`9gz
return queue[1]; SZm)`r\A
} W=k%aB?p
';z5]O~
public void remove() { -'OO6mU
SortUtil.swap(queue,1,size--); NJglONO
fixDown(1); h8MkfHH7{
} ]XH}G9X^
file://fixdown [o,S.!W8
private void fixDown(int k) { )d|hIW]7(
int j; 1#3 Qa{i
while ((j = k << 1) <= size) { BsX# ~
if (j < size %26amp;%26amp; queue[j] j++; SLze) ?.
if (queue[k]>queue[j]) file://不用交换 ?)~j>1"S
break; 4{r_EV[(
SortUtil.swap(queue,j,k); q;V1fogqI)
k = j; $iblLZhj
} %aszZP
} :9E_L2M
private void fixUp(int k) { 5vso%}c
while (k > 1) { dIR6dI
int j = k >> 1; =abth6#)
if (queue[j]>queue[k]) )*Qa9+:
break; d^w*!<8
SortUtil.swap(queue,j,k); :a4FO
k = j; :tA|g
} Um$a9S8b&
} ymsqJ
Mwdw7MZ"S
} 69v[*InSd
]cv|A^
} E+&]96*Lby
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SortUtil： YTco;5/
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package org.rut.util.algorithm; o\luE{H .?
(qP !x 2j
import org.rut.util.algorithm.support.BubbleSort; 0P_Y6w+
import org.rut.util.algorithm.support.HeapSort; nAp7X-t
import org.rut.util.algorithm.support.ImprovedMergeSort; 4D/mm(2d$
import org.rut.util.algorithm.support.ImprovedQuickSort; >)N}V'9
import org.rut.util.algorithm.support.InsertSort; Lz VvUVk
import org.rut.util.algorithm.support.MergeSort; RhJL`>W`
import org.rut.util.algorithm.support.QuickSort; 2,>q(M6,EA
import org.rut.util.algorithm.support.SelectionSort; Yb|zE
import org.rut.util.algorithm.support.ShellSort; %V$ujun`
N!fp;jvG
/** h,@x5q>g
* @author treeroot N[$(y} !s
* @since 2006-2-2 pr-{/6j6
* @version 1.0 QsmG(1=
*/ L#e|t0'#
public class SortUtil { BX),U
public final static int INSERT = 1; tc{23Rf%
public final static int BUBBLE = 2; b'N"?W^YQ
public final static int SELECTION = 3; aNW&ib
public final static int SHELL = 4; P-~Avb
public final static int QUICK = 5; ~X;(m<f2
public final static int IMPROVED_QUICK = 6; #oYX0wvl
public final static int MERGE = 7; 9tS&$-
public final static int IMPROVED_MERGE = 8; ]T+.kC M
public final static int HEAP = 9; >NE]TZ.F
YV 9*B
public static void sort(int[] data) { `,(1'
sort(data, IMPROVED_QUICK); UY**3MK
} ZUyM:$
private static String[] name={ zYOPE 6E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n20H{TA
}; IBVP4&}x$
%a/O7s6
private static Sort[] impl=new Sort[]{ tS2lex%
new InsertSort(), gzDb~UEoF
new BubbleSort(), 9wKz p
new SelectionSort(), _<.R\rX&
new ShellSort(), q<JI!n1O
new QuickSort(), y|KDh'Y
new ImprovedQuickSort(), gWS49*O
new MergeSort(), #%e`OA(b
new ImprovedMergeSort(), a~ REFy
new HeapSort() ,`|KNw5
}; d*3R0Q|#{
?=IbiT
public static String toString(int algorithm){ 7k3":2:
return name[algorithm-1]; B0Z~L){i
} V!KtF
@F7QQs3
public static void sort(int[] data, int algorithm) { c2"eq2'BS
impl[algorithm-1].sort(data); kXX RMR
} rI]:| k
)KRO=~Y
public static interface Sort { q#\eL~k
public void sort(int[] data); WaMn[/{
} +N4h Q"
9Zrn(D
public static void swap(int[] data, int i, int j) { 8}\"LXRbo
int temp = data; &P ;6P4x
data = data[j]; ur#"f'|-
data[j] = temp; 0l_-
} `bC_J,>_
} 1shvHmrV