[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; _>dqz(8#
} >tr_Ypfv,c
int i1=l; r{YyKSL1*K
int i2=mid+1; ::j'+_9
for(int cur=l;cur<=r;cur++){ bsuUl*l)
if(i1==mid+1) p87s99
data[cur]=temp[i2++]; T 2x~fiM
else if(i2>r) eG"iJ%I
data[cur]=temp[i1++]; q&<#)#+
else if(temp[i1] data[cur]=temp[i1++]; /quf'CV}
else W ;P1T"*A
data[cur]=temp[i2++]; 'uo`-Y
} ~BERs;4
} \xDu#/^
[9BlP
} "2HRuqf
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改进后的归并排序: umcbIi('
$-=aqUU
package org.rut.util.algorithm.support; HoH3.AY X
@Sq=#f/=
import org.rut.util.algorithm.SortUtil; 7@fd[
6N~ jt
/** >,@Fz)\:{'
* @author treeroot <j ;HRm
* @since 2006-2-2 nKu`Ta*fX
* @version 1.0 ,H22;UV9
*/ vEtogkFA"
public class ImprovedMergeSort implements SortUtil.Sort { qt^%jIv
pr;<n\Y{
private static final int THRESHOLD = 10; 6ynQCD
xXA$16kd
/* g~FB&U4c
* (non-Javadoc) u\t[rC=yd
* [O"i!AQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4=o3ZRV
*/ (pi7TSJ
public void sort(int[] data) { {)4Vv`n
int[] temp=new int[data.length]; F#X\}MvEU
mergeSort(data,temp,0,data.length-1); ;f=:~go
} .7ahz8v
F|xXMpC.f
private void mergeSort(int[] data, int[] temp, int l, int r) { @h>#cwhU
int i, j, k; ua|qL!L+
int mid = (l + r) / 2; nXi6Q+YI
if (l == r) ^}/YGAA
return; 5\R8>G~H
if ((mid - l) >= THRESHOLD) ?aOR ^ K
mergeSort(data, temp, l, mid); + {a
else 45kMIh~~X
insertSort(data, l, mid - l + 1); R3?~+y&
if ((r - mid) > THRESHOLD) Vq9hAD|k
mergeSort(data, temp, mid + 1, r); o&(%:|
else ni2H~{]z
insertSort(data, mid + 1, r - mid); 82O`<Ci
"MoV*U2s,
for (i = l; i <= mid; i++) { "5{Yn!-:
temp = data; LTzf&TZbx5
} ^ / f*5k
for (j = 1; j <= r - mid; j++) { 2<ef&?ljk
temp[r - j + 1] = data[j + mid]; /R|"/B0
} _& KaI }O
int a = temp[l]; C>T6{$xkC
int b = temp[r]; <>j,Q
for (i = l, j = r, k = l; k <= r; k++) { *zX<`E
if (a < b) { :6HMb^4
data[k] = temp[i++]; JYv&It
a = temp; ;Jx ^
} else { OR?8F5o?p
data[k] = temp[j--]; ]\#RsVX
b = temp[j]; ni~45WX3
} oC4rL\d{
} (/k,q
} (]7@0d88
,P auP~L
/** NA/+bgyuT>
* @param data * +OAc`8
* @param l -F8%U:2a
* @param i 3g-}k
*/ tCc}}2bC&
private void insertSort(int[] data, int start, int len) { h$ZF[Xbfe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _^P>@ ^
} 5+ fS$Q
} Cs]xs9
} 0 |F(qR
} 4?%0z) g
tmb0zuJ&C!
堆排序： ?7G[`@^Y
t:M>&r:BL
package org.rut.util.algorithm.support; #( kT
b]|7{yMV
import org.rut.util.algorithm.SortUtil; A=XM(2{aN
H.>KYiv+
/** Llk`
* @author treeroot HnY: gu
* @since 2006-2-2 3_33@MM
* @version 1.0 X,y$!2QI
*/ %'g/4I
public class HeapSort implements SortUtil.Sort{ /OxF5bN2
X='4N<
/* (non-Javadoc) 2ZE4^j|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .Bi7~*N
*/ l
public void sort(int[] data) { ImF/RKI~ "
MaxHeap h=new MaxHeap(); xUSIck
h.init(data); Q|xPm:
for(int i=0;i h.remove(); u"|.]r
System.arraycopy(h.queue,1,data,0,data.length); koqH~>ZtD
} E&[ox[g{
~4\bR
private static class MaxHeap{ 7,+:QY@
)%MBo.NL
void init(int[] data){ rcyH2)Y/e
this.queue=new int[data.length+1]; _@^msyoq
for(int i=0;i queue[++size]=data; jXW71$B
fixUp(size); 4cV(Z-\
} *S=v1 s/
} }'@*Olj
~?L. n:wu
private int size=0; i,)kI
F'*{Fk h
private int[] queue; ;c;;cJc!
]]7s9PCN
public int get() { CX1'B0=\r
return queue[1]; 'E7|L@X"r
} |20p#]0E+
LXK+WB/s
public void remove() { Sk1yend4
SortUtil.swap(queue,1,size--); V'6%G:?0a
fixDown(1); G7),!Qol
} 5k\61(*s
file://fixdown kwyvd`J8
private void fixDown(int k) { ^T<<F}@q
int j; /\=g;o'
while ((j = k << 1) <= size) { _Y~+ #Vc
if (j < size %26amp;%26amp; queue[j] j++; .79'c%3}
if (queue[k]>queue[j]) file://不用交换 }2h~o~
break; YE^|G,]
SortUtil.swap(queue,j,k); Ybok[5
k = j; 6~2!ZU
} \,_%e[g49
} =)T5Y,+rJ
private void fixUp(int k) { rsc8lSjH
while (k > 1) { )?_c7 R
int j = k >> 1; W}Z|v M$
if (queue[j]>queue[k]) s+(8KYTs`
break; VTV-$Du[}
SortUtil.swap(queue,j,k); ^c!Hur6)
k = j; (>Tu~Vo
} =UYc~VUYnT
} ~5JXY5*o
i4uUvZf
} IB?5y~+h
9pk<=F
} Z&21gN
$)\ocsO
SortUtil： -Ol/r=/&
TSD7.t)^
package org.rut.util.algorithm; $MP'j9-S?
3N<FG.6
import org.rut.util.algorithm.support.BubbleSort; &1VC0"YJWy
import org.rut.util.algorithm.support.HeapSort; "4ovMan
import org.rut.util.algorithm.support.ImprovedMergeSort; N2x\O~7
import org.rut.util.algorithm.support.ImprovedQuickSort; -ff*,b$Q/
import org.rut.util.algorithm.support.InsertSort; #PFf`7b,z
import org.rut.util.algorithm.support.MergeSort; U`:$1*(`
import org.rut.util.algorithm.support.QuickSort; \6sp"KqP
import org.rut.util.algorithm.support.SelectionSort; eR;cl$
import org.rut.util.algorithm.support.ShellSort; RE*SdazY?
#^eviF8
/** Dpof~o,f
* @author treeroot T"dEa-O
* @since 2006-2-2 paiF ah
* @version 1.0 km8[azB o
*/ hDfsqSK0 /
public class SortUtil { cQN}z Ke
public final static int INSERT = 1; ;up89a-,9
public final static int BUBBLE = 2; @y}1%{,%
public final static int SELECTION = 3; h"q`gj
public final static int SHELL = 4; ymzlRs1^Ct
public final static int QUICK = 5; N.3M~0M*
public final static int IMPROVED_QUICK = 6; }9@,EEhg
public final static int MERGE = 7; *%Q!22?6F
public final static int IMPROVED_MERGE = 8; oU{m\r
public final static int HEAP = 9; 2AU_<Hr6
^S[Mg6J
public static void sort(int[] data) { PiM@iS
sort(data, IMPROVED_QUICK); r0hu?3u1?
} xy[R9_V
private static String[] name={ #,$d!l @
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jtN2%w;
}; :~g=n&x
0h$23.
private static Sort[] impl=new Sort[]{ mNs&*h}
new InsertSort(), 7zy6`OP
new BubbleSort(), bl:.D~@
new SelectionSort(), jYuH zf
new ShellSort(), &grT}
new QuickSort(), H{9di\xnEm
new ImprovedQuickSort(), ^TnBtIU-B
new MergeSort(), p"Fj6T2
new ImprovedMergeSort(), LL.YkYu
new HeapSort() q(_pk&/
}; 4WDh8U
nV GrW#'E
public static String toString(int algorithm){ /1g_Uv;
return name[algorithm-1]; ,LU/xI0O
} RXLD5$s^
@R>J\>
public static void sort(int[] data, int algorithm) { a B%DIH,
impl[algorithm-1].sort(data); rT5dv3^MW!
} >*dqFZF
t|d9EC]c(
public static interface Sort { @ Al\:
public void sort(int[] data); hesL$Z [
} ,%yjEO
vA:1z$m
public static void swap(int[] data, int i, int j) { X8p-VCkV
int temp = data; De\&r~bTW9
data = data[j]; Ll%[}C?~]?
data[j] = temp; $^}?98m
} }"%tlU!}
} d\D.l^