[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; kRXg."b(
} 6'*Uo:]
int i1=l; |>}0? '/]
int i2=mid+1; ?N?pe}
for(int cur=l;cur<=r;cur++){ pr,1Wp0l
if(i1==mid+1) KJJb^6P48W
data[cur]=temp[i2++]; (*WZsfk>/<
else if(i2>r) wukos5
data[cur]=temp[i1++]; ?G>TaTiK#
else if(temp[i1] data[cur]=temp[i1++]; _5S$mc8K0
else JTB~nd>
data[cur]=temp[i2++]; +e4<z%1
} CU`Oc>;*T
} g!Yh=kA'N
hYv 6-5_
} 6F&]Mk]V8
K2MNaB
改进后的归并排序: iEgM~
-+_aL4.
package org.rut.util.algorithm.support; -Fc#
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import org.rut.util.algorithm.SortUtil; Yg,lJ!q
n@,eZ!
/** p{svXP K
* @author treeroot W#_gvW
* @since 2006-2-2 `0XbV A
* @version 1.0 V>uW|6
*/ fX$4TPy(h
public class ImprovedMergeSort implements SortUtil.Sort { P:-/3
$,zM99
private static final int THRESHOLD = 10; &r5%WRzpYT
$#JVI:
/* [%,=0P}
* (non-Javadoc) j~f 7WJ
* |b~g^4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2|>wY%
*/ la|l9N^,
public void sort(int[] data) { >8;%F<o2
int[] temp=new int[data.length]; `[:1!I.}-
mergeSort(data,temp,0,data.length-1); _"bvT?|
} SA n=9MG
#I~dv{RX
private void mergeSort(int[] data, int[] temp, int l, int r) { s^R2jueR
int i, j, k; HtYR 0J
int mid = (l + r) / 2; H08YMP>dc
if (l == r) ;p!hd}C
return; :BxYaAVt^
if ((mid - l) >= THRESHOLD) ZLX`[
mergeSort(data, temp, l, mid); Ns8NaD
else WzbN=& C]h
insertSort(data, l, mid - l + 1); VD`2lGdF
if ((r - mid) > THRESHOLD) p)&\>
mergeSort(data, temp, mid + 1, r); l"y9XO|
else =d.W'q|
insertSort(data, mid + 1, r - mid); A2_3zrE
%_O>Hy|p
for (i = l; i <= mid; i++) { <G?85*Nv_
temp = data; 6-}e-H
} .V:<w~=b
for (j = 1; j <= r - mid; j++) { [m[~A|S
temp[r - j + 1] = data[j + mid]; ?'m5)Z{
} x)Kh_G
int a = temp[l]; Tm.w+@
int b = temp[r]; slO9H6<
for (i = l, j = r, k = l; k <= r; k++) { '^3pF2lIw
if (a < b) { VZbIU[5
data[k] = temp[i++]; v$/i5kcWx
a = temp; B_jI!i{N%o
} else { }C`0" 1
data[k] = temp[j--]; > BCX%<&
b = temp[j]; grAL4
} r74w[6(
} s(Bi&C\
} 0MGK3o)
[z@RgDXv
/** .h^Ld,Chj
* @param data u`,R0=<4
* @param l A_U0HVx_
* @param i K :ptfD
*/ Bin&:%|9?
private void insertSort(int[] data, int start, int len) { >.~k?_Of
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5{aQ4H>~tx
} 4GA-dtyV&
} )?y"NVc*
} 8Kkr1}!wd
} #|E. y^IC
&scD)
堆排序： BTtYlpN6
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package org.rut.util.algorithm.support; xmd$Jol^
{\Y,UANZ
import org.rut.util.algorithm.SortUtil; B#n}y
#wuE30d
/** g~u!,Zc
* @author treeroot *X5LyO3-gP
* @since 2006-2-2 3PeJPw
* @version 1.0 |]b/5s;>
*/ 0Hf-~6
public class HeapSort implements SortUtil.Sort{ 481u1
NZ9,9
/* (non-Javadoc) k rjd:*E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) baGI(Dk
*/ k-0e#"B
public void sort(int[] data) { uRhH_c-6C
MaxHeap h=new MaxHeap(); S]@iS[|?
h.init(data); v3#47F)
for(int i=0;i h.remove(); 5*Iz3vTq
System.arraycopy(h.queue,1,data,0,data.length); ')~HOCBSE
} IWnW(>V
D"5~-9<
private static class MaxHeap{ MRu+:Y=K
S@-X?Lu
void init(int[] data){ YP97D n
this.queue=new int[data.length+1]; sOenR6J<$
for(int i=0;i queue[++size]=data; :PkSX*E[q
fixUp(size); T5G+^XDA
} m':m`,c!
} -8etH&
hV>Ey^Ty
private int size=0; jZyh
Z6pDQ^Ii
private int[] queue; /tP
1h{_v!X
public int get() { X)5O@"4 ?
return queue[1]; mz'8
} n&&y\?n
g;@PEZk1
public void remove() { 3qZ{yr2N[
SortUtil.swap(queue,1,size--); <!$Cvx\U
fixDown(1); wt,N<L
} rMloj8O*
file://fixdown CKgyv%T5m:
private void fixDown(int k) { wu'60po
int j; izA3INT
while ((j = k << 1) <= size) { {+}Lc$O#C
if (j < size %26amp;%26amp; queue[j] j++; kp"cHJNx
if (queue[k]>queue[j]) file://不用交换 -7Wmq[L/
break; '.yr8
SortUtil.swap(queue,j,k); ]"_'o~
k = j; |V]E8Qt
} f}3bYF
} ]P^ +~
private void fixUp(int k) { 6Wp:W1E{`
while (k > 1) { =wc[r?7
int j = k >> 1; Hq8.O/Y"=
if (queue[j]>queue[k]) G9Ezm*I;:
break; 2YQ$hL~
SortUtil.swap(queue,j,k); $E6uA}s
k = j; H&+s&F{%
} \02e zG
} h~t]WN
B[h9epU]K
} E>v~B;@
E"!*ASN
} beoMLHp
so?1lG
SortUtil： D1 z3E;:
f}4h}Cq
package org.rut.util.algorithm; !s:|Ddv
(reD
import org.rut.util.algorithm.support.BubbleSort; =?hlgQ
import org.rut.util.algorithm.support.HeapSort; I+SL0
import org.rut.util.algorithm.support.ImprovedMergeSort; ( d.i np(
import org.rut.util.algorithm.support.ImprovedQuickSort; dl4.jLY
import org.rut.util.algorithm.support.InsertSort; Qfi5fp=f
import org.rut.util.algorithm.support.MergeSort; d=XhOC$
import org.rut.util.algorithm.support.QuickSort; C+j+q648>
import org.rut.util.algorithm.support.SelectionSort; @VAhmYz
import org.rut.util.algorithm.support.ShellSort; wVTo7o%U
gS ]'^Sr
/** dewu@
* @author treeroot czzV2P/t}
* @since 2006-2-2 ] $*cmk(Y
* @version 1.0 &0`L;1R
*/ q ^?{6}sy
public class SortUtil { R<)uvW_@
public final static int INSERT = 1; LWE !+(n
public final static int BUBBLE = 2; rO~D{)Nu
public final static int SELECTION = 3; I/l]Yv!
public final static int SHELL = 4; a@./e @p
public final static int QUICK = 5; F=H=[pSe
public final static int IMPROVED_QUICK = 6; '*:YC
public final static int MERGE = 7; Ho/5e*X
public final static int IMPROVED_MERGE = 8; *`W82V
public final static int HEAP = 9; QX4I+x~oo\
f$L5=V
public static void sort(int[] data) { sAxn ; `
sort(data, IMPROVED_QUICK); |^{IHF\
} \wd~Y
private static String[] name={ .:0nK bW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z3d&I]Tf
}; f]4gDmn^
K+Qg=vGY
private static Sort[] impl=new Sort[]{ FP$]D~DMo
new InsertSort(), 2iu;7/
new BubbleSort(), <fxYTd<#D[
new SelectionSort(), ^]kDYhe*Y
new ShellSort(), K67x.PZ
new QuickSort(), wU3Q
new ImprovedQuickSort(), 03xQ%"TU<
new MergeSort(), x]:mc%4-Z
new ImprovedMergeSort(), dNR4h
new HeapSort() |@+ x9|'W
}; :;EzvRy
PHoW|K_e
public static String toString(int algorithm){ $8Zw<aEJ
return name[algorithm-1]; ^t*BWJxPC
} %$08*bAtB7
A-<qr6q
public static void sort(int[] data, int algorithm) { zy.Ok 49
impl[algorithm-1].sort(data); XjC+kH
} YG%Zw
C5m*pGImG
public static interface Sort { G100L}d"N
public void sort(int[] data); ;Wr$hDt^
} 5ZPl`[He
4-o$OI>
public static void swap(int[] data, int i, int j) { pq@ad\8
int temp = data; /{lls2ycW%
data = data[j]; +XQ6KG&
data[j] = temp; #f[yp=uI:
} QS!b]a3
} w/R^Vwq