[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; "#k(V=y
} E=*Q\3G~
int i1=l; wEc5{ b5M
int i2=mid+1; 3M*[a~
for(int cur=l;cur<=r;cur++){ [f(^vlK
if(i1==mid+1) ~wg^>!E
data[cur]=temp[i2++]; g):jZU]b
else if(i2>r) (a!,)
data[cur]=temp[i1++]; D"f(nVEr
else if(temp[i1] data[cur]=temp[i1++]; "wC5hj]
else E d/O\v@
data[cur]=temp[i2++]; _NnOmwK7
} H 7F~+Q-}
} lFV|GJ
g uWqHVSs
} 0_pwY=P
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改进后的归并排序: ~ A|*]0,
q;PzB4#
package org.rut.util.algorithm.support; 3D dG$@
kj=2+)!E7
import org.rut.util.algorithm.SortUtil; :|Nbk58
>t}D5ah
/** 2U+p@}cQUA
* @author treeroot Ol[IC
* @since 2006-2-2 <!(n5y_
* @version 1.0 #}yFHM?i
*/ 7 ~8Fs@
public class ImprovedMergeSort implements SortUtil.Sort { %9Fg1LH42r
X*"O'XCA
private static final int THRESHOLD = 10; 0U*"OSpF
PQ1NQy8
/* bK1`a{
* (non-Javadoc) @BhAFv,7
* V=MZOj6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9cj-v}5j
*/ \^LR5S&
public void sort(int[] data) { {/!Gh\i
int[] temp=new int[data.length]; HZ=yfJs nc
mergeSort(data,temp,0,data.length-1); g|_*(=Q
} ?R:Hj=.
~At.V+
private void mergeSort(int[] data, int[] temp, int l, int r) { '+zsj0!A
int i, j, k; ahv=HWX k
int mid = (l + r) / 2; tp2 _OQAQ
if (l == r) KptLeb:Om
return; ..TjEBp
if ((mid - l) >= THRESHOLD) YDD]n*&
mergeSort(data, temp, l, mid); ADz|Y~V!
else s7} )4.vO
insertSort(data, l, mid - l + 1); --FtFo
if ((r - mid) > THRESHOLD) ,peE'
mergeSort(data, temp, mid + 1, r); C$gLi8|m
else GTNTx5H
insertSort(data, mid + 1, r - mid); OR8o%AxL7
M?u)H&kEl
for (i = l; i <= mid; i++) { Sxu v}y\
temp = data; S]g)^f'a65
} 4O^1gw
for (j = 1; j <= r - mid; j++) { r=aQS5
temp[r - j + 1] = data[j + mid]; q~_jF$9SX
} dtl<
int a = temp[l]; ,jcp"-5#j
int b = temp[r]; ttVSgKAsm
for (i = l, j = r, k = l; k <= r; k++) { BIyG[y?qO
if (a < b) { o2jB~}VMl
data[k] = temp[i++]; '=* 5C{
a = temp; =oDrN7`,B
} else { K_3ZJ
data[k] = temp[j--]; 4]KceE
b = temp[j]; H4Ek,m|c
} >E=a~ O
} O8o18m8UH
} &W!@3O{~.
a<.@+sj{
/** iNSJOS
* @param data .r'.5RI A
* @param l \0*LfVr;P
* @param i a$:N9&P
*/ c'R|Wyf
private void insertSort(int[] data, int start, int len) { v4aGL<SO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M6!brj\[|
} 7^=jv~>wP
} =^vUb
} @7'gr>_E
} B=|sLs`I
'WCTjTob/
堆排序： {!h[@f4
>,vuC4v-
package org.rut.util.algorithm.support; {piS3xBi
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import org.rut.util.algorithm.SortUtil; g\'84:*J\
h+(s/o?\
/** 7RJW
* @author treeroot < *OF
* @since 2006-2-2 LL+rdxJO^
* @version 1.0 6suc:rp";
*/ JH#+E04#
public class HeapSort implements SortUtil.Sort{ k<H&4Z)d9
bxq`E!]
/* (non-Javadoc) cgOoQP/#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K? k`U,
*/ FG\?_G
public void sort(int[] data) { %xz02$k
MaxHeap h=new MaxHeap(); sNVD"M,
h.init(data); h+@t8Q;gGw
for(int i=0;i h.remove(); \gpKQt0
System.arraycopy(h.queue,1,data,0,data.length); |\t_I~de
} 0=&]!WRT
l/LUwDI{
private static class MaxHeap{ H#E0S>Jw|
Nl _Jp:8s
void init(int[] data){ H'.eqZM
this.queue=new int[data.length+1]; w"|c;E1;_
for(int i=0;i queue[++size]=data; >0oc=9H8
fixUp(size); [^f`D%8o
} 'C<=bUM
} qcF{Kex"
r_m&Jl@4
private int size=0; [:qX3"B
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private int[] queue; U"]i.J1
[-ecKPx
public int get() { ]\lw^.%
return queue[1]; E?uv&evPK7
} CjGI}t
A )cb
public void remove() { HZ3<}`P_W
SortUtil.swap(queue,1,size--); i1C'
fixDown(1); <0m;|Ai'W
} R?Qou!*]
file://fixdown J:a^''
private void fixDown(int k) { QR)eJ5<
int j; -(EqBr@_
while ((j = k << 1) <= size) { :JYOC+#q7
if (j < size %26amp;%26amp; queue[j] j++; , +^db)
if (queue[k]>queue[j]) file://不用交换 x!+a,+G
break; -j,o:ng0
SortUtil.swap(queue,j,k); }1wuH
k = j; I_rVeMw=
} Fz% n!d
} XEI]T~
private void fixUp(int k) { ( 9l|^w["
while (k > 1) { K]l)z* I
int j = k >> 1; plq\D.C
if (queue[j]>queue[k]) 14R))Dz"
break; W+E2({
SortUtil.swap(queue,j,k); &AVi4zV
k = j; qz&)|~,\C
} 3^Y-P8.zdB
} $B2@mC([S
RZZB?vx
} P}jr 8Z
|Th{*IJ<,
} ~nQb;Bdh%
ra1hdf0"
SortUtil： W=*\4B]
^BZdR<;
package org.rut.util.algorithm; sMx\WTyz
"`k[4C
import org.rut.util.algorithm.support.BubbleSort; YS*t7
import org.rut.util.algorithm.support.HeapSort; oS4ag
import org.rut.util.algorithm.support.ImprovedMergeSort; va0 a4s1O
import org.rut.util.algorithm.support.ImprovedQuickSort; y~fy0P:T
import org.rut.util.algorithm.support.InsertSort; `t -3(>P
import org.rut.util.algorithm.support.MergeSort; 7o<RvM
import org.rut.util.algorithm.support.QuickSort; ;/.ZYTD
import org.rut.util.algorithm.support.SelectionSort; ~U|te_l
import org.rut.util.algorithm.support.ShellSort; @WmB0cc_
JpDkf$kM
/** ! [X<>
* @author treeroot X {$gdz8S9
* @since 2006-2-2 cQny)2k*x
* @version 1.0 I zT%Kq
*/ k8TMdWW
public class SortUtil { >&R|t_ypw
public final static int INSERT = 1; yWuq/J:
public final static int BUBBLE = 2; s5.2gu|"%
public final static int SELECTION = 3; v:chr$>j5
public final static int SHELL = 4; \0$?r4A
public final static int QUICK = 5; -l",!sV
public final static int IMPROVED_QUICK = 6; ])`F$S
public final static int MERGE = 7; H4N==o
public final static int IMPROVED_MERGE = 8; = U5)m
public final static int HEAP = 9; 8Y9mB#X
SO)??kQ{U
public static void sort(int[] data) { h5JXKR.1]c
sort(data, IMPROVED_QUICK); ll#PCgIm
} S(Pal/-"
private static String[] name={ ;8@A7`^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,oCr6 ]
}; i< ih :
_ |; bh
private static Sort[] impl=new Sort[]{ nT>?}/S
new InsertSort(), 6Z$T&Ul{
new BubbleSort(), W+S>/`N
new SelectionSort(), k`-L5#`
new ShellSort(), w*+rBp,f
new QuickSort(), >QyMeH
new ImprovedQuickSort(), u1uY*p
new MergeSort(), K"pfp !Y
new ImprovedMergeSort(), 1#'wR3[+
new HeapSort() Xf0pQ]8\
}; r~sGot+sQA
L{42?d
public static String toString(int algorithm){ 6V)#Yf
return name[algorithm-1]; l$FHL2?Cp
} it.l;L_nW
mp#5Vc
public static void sort(int[] data, int algorithm) { . &e,8
impl[algorithm-1].sort(data); Y/ `fPgE
} G/y< bPQ
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public static interface Sort { Uz0mSfBp
public void sort(int[] data); G -;Yua2\
} ]?kf;A@
':Te#S
public static void swap(int[] data, int i, int j) { Cc^t&Eg
int temp = data; Po2YDj`
data = data[j]; !} 1p:@
data[j] = temp; qRU8uu
} = *sP, 6
} a7+BAma<