[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; w?^qAj(*d
} pyA;%vJn
int i1=l; 4%L`~J4 wr
int i2=mid+1; *^R?*vNs
for(int cur=l;cur<=r;cur++){ o*OYZ/_L
if(i1==mid+1) XOsPKq
data[cur]=temp[i2++]; ` #Qlr+X
else if(i2>r) !#0Lo->OO
data[cur]=temp[i1++]; d?dZ=]~C
else if(temp[i1] data[cur]=temp[i1++]; s=0z%~H
else -*8|J;
data[cur]=temp[i2++]; }Z5f5q
} w"Gci~]bXU
} ">='l9
/wplP+w2
} G gmv(!
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改进后的归并排序: R;+vE'&CO
KF^5 C
package org.rut.util.algorithm.support; P]]re,&R
jOL$kiW0
import org.rut.util.algorithm.SortUtil; Q)eYJP=W
'p3JYRT$
/** ^NZq1c
* @author treeroot K|Sh
* @since 2006-2-2 /VFh3n>I2
* @version 1.0 o^P/ -&T
*/ ZmSe>}B=
public class ImprovedMergeSort implements SortUtil.Sort { 0mcZe5RS
/NvHM$5O%
private static final int THRESHOLD = 10; $#R@x.=
Pn:L=*
/* *o<zo `
* (non-Javadoc) wlc Cz
* gA0:qEL\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F_>OpT
*/ J3Ipk-'lx
public void sort(int[] data) { OwhMtYq
int[] temp=new int[data.length]; R42+^'af
mergeSort(data,temp,0,data.length-1); pVgzUu7
} ;a@%FWc
u#9H
private void mergeSort(int[] data, int[] temp, int l, int r) { tkT:5O6
int i, j, k; zN2CI6
int mid = (l + r) / 2; ~qFuS933
if (l == r) gaFOm9y.e
return; +T]/4"^M
if ((mid - l) >= THRESHOLD) M7U:UV)
mergeSort(data, temp, l, mid); BYjEo
else J~.8.]gXW
insertSort(data, l, mid - l + 1); DIrQ5C
if ((r - mid) > THRESHOLD) 3 !W M'i
mergeSort(data, temp, mid + 1, r); CK4C:`YG
else TmI~P+5w
insertSort(data, mid + 1, r - mid); \F`%vZrKR
}HdibCAOf
for (i = l; i <= mid; i++) { QD6<sw@]P
temp = data; "u#,#z_
} Zb> UY8
for (j = 1; j <= r - mid; j++) { )fPN6x/e
temp[r - j + 1] = data[j + mid]; /2 V
} y5>X0tT
int a = temp[l]; tf1iRXf8
int b = temp[r]; 4:1URhE
for (i = l, j = r, k = l; k <= r; k++) { Mn`);[
if (a < b) { D^]g`V*N
data[k] = temp[i++]; .|ZO2MCd
a = temp; 1 Hw%DJ
} else { [2h4%{R&
data[k] = temp[j--]; Sv&_LZ-"P
b = temp[j]; =$kSvCjP
} 2G=prS`s
} ySkz5K+|g
} GYp}V0
l1_hD,4
/** {lv@V*_Y0
* @param data jU~q~e7Te
* @param l L!/Zw~
* @param i K+HP2|#6
*/ X*'i1)_h
private void insertSort(int[] data, int start, int len) { P_(QG 6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); },r9f MJ
} _x+)Tv
} JU>F&g/|
} 'YFy6rds
} +!"GYPUXy
LN=6u
堆排序： *;E\,,Io
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package org.rut.util.algorithm.support; B EN U
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import org.rut.util.algorithm.SortUtil; TR7j`?
Pk2=*{:W
/** (:|g"8mQm
* @author treeroot QOT|6)Yb
* @since 2006-2-2 &/+LY_r'<I
* @version 1.0 h*X5Oh6
*/ fYxdG|>{u
public class HeapSort implements SortUtil.Sort{ BIQQJLu
+f){x9 :
/* (non-Javadoc) gUa-6@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W!Qaa(o?
*/ h#:_GNuF
public void sort(int[] data) { L!| `IK
MaxHeap h=new MaxHeap(); 8'<RPU}M
h.init(data); S{d]0
for(int i=0;i h.remove(); (T65pP_P 7
System.arraycopy(h.queue,1,data,0,data.length); ]a=n(`l?
} lGhhH_
uO^,N**R#
private static class MaxHeap{ 7T69tQZ<
xj< K6
void init(int[] data){ jNbU{Z%r
this.queue=new int[data.length+1]; ^55q~DP}>
for(int i=0;i queue[++size]=data; 9*Z!=Y#4,
fixUp(size); xI>HY9i)
} <>shx;g^C
} Pt=@U:
/mK."5-cm
private int size=0; .ri?p:a}w
As>-9p>v
private int[] queue; r"4&.&6
e'dx Y(
public int get() { ]H-5
return queue[1]; P*!~Z*"
} 9O4\DRe5c
|s!<vvp]
public void remove() { -`cNRd0n
SortUtil.swap(queue,1,size--); Z,_EhEm
fixDown(1); Y 8Dn&W
} 7W.z8>p
file://fixdown ]^>RBegJBO
private void fixDown(int k) { \Dx5=Lh
int j; E51'TT9
while ((j = k << 1) <= size) { ;659E_y>
if (j < size %26amp;%26amp; queue[j] j++; hd>_K*oH
if (queue[k]>queue[j]) file://不用交换 =WEWs4V5A
break; TQL_K8k@_
SortUtil.swap(queue,j,k); P;bOtT --
k = j; p!/ *(TT
} .VA'W16
} KN<KZM
private void fixUp(int k) { tq.g4X ;_
while (k > 1) { :"Gd;~p.
int j = k >> 1; Sp-M:,H3H
if (queue[j]>queue[k]) Yu+;vjbK-
break; 19]O;
SortUtil.swap(queue,j,k); *|B5,Ey
k = j; gR76g4|=;
} u OB`A-K
} 3kJ7aBiR<
lz:+y/+1
} __Egr@
YgLHp/
} GswV/V+u
p?,T%G+gqO
SortUtil： N"Cd{3
WqRaD=R->;
package org.rut.util.algorithm; K<vb4!9Z9
G\C>fwrP_
import org.rut.util.algorithm.support.BubbleSort; 0?w4
import org.rut.util.algorithm.support.HeapSort; @$7l
import org.rut.util.algorithm.support.ImprovedMergeSort; O_P8OA#|
import org.rut.util.algorithm.support.ImprovedQuickSort; fX/k;0l
import org.rut.util.algorithm.support.InsertSort; QI4a@WB]ok
import org.rut.util.algorithm.support.MergeSort; 91oAg[@4G
import org.rut.util.algorithm.support.QuickSort; l<UJ@XID$
import org.rut.util.algorithm.support.SelectionSort; F*_ytL
import org.rut.util.algorithm.support.ShellSort; {1}p+dEK
= KJ_LE~)
/** |bX{MF
* @author treeroot F3=iyiz6
* @since 2006-2-2 }kF*I@:g
* @version 1.0 mNQ*YCq.
*/ 5;[h&jH
public class SortUtil { "ZR^w5
public final static int INSERT = 1; P"s7}cl
public final static int BUBBLE = 2; nC@UK{tVa
public final static int SELECTION = 3; xG8z4Yu
public final static int SHELL = 4; EMw biGV
public final static int QUICK = 5; fctVJ{?
public final static int IMPROVED_QUICK = 6; V_P,~!
public final static int MERGE = 7; /_ RrNzqy
public final static int IMPROVED_MERGE = 8; t}>"nr0
public final static int HEAP = 9; en8l:INX
AkX8v66:
public static void sort(int[] data) { NGAjajB
sort(data, IMPROVED_QUICK); osPrr QoH
} :rnj>U6<>
private static String[] name={ s}Q*zy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v]U0@#/p
}; TIVrbO\!o
nA.~}
private static Sort[] impl=new Sort[]{ %)}y[ (
new InsertSort(), pVC;''E
new BubbleSort(), ~IS3i'bh
new SelectionSort(), ;hkzL_' E)
new ShellSort(), !3Ed0h]Bfa
new QuickSort(), 8gXf4A(N
new ImprovedQuickSort(), +7$zL;ph=n
new MergeSort(), e)kVS}e?
new ImprovedMergeSort(), vFH1hm
new HeapSort() P3+?gW'
}; (T8dh|
dL|*#e
public static String toString(int algorithm){ f1RX`rXf
return name[algorithm-1]; 4L/8Hj#g
} (E<QA
/u pDbP.O
public static void sort(int[] data, int algorithm) { h%!N!\
impl[algorithm-1].sort(data); YnwP\Arfq
} i4\m/&of3y
[8rl{~9E
public static interface Sort { Y5\=5r/
public void sort(int[] data); &BkdC,o
} gB}UzEj^<
$LJCup,1"
public static void swap(int[] data, int i, int j) { b:YyzOqEu
int temp = data; MzCZj
data = data[j]; A9C
data[j] = temp; #]e](j>]
} ;`}b .S=n
} $v~I n