[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; b-@6w(j
} e 9U\48
int i1=l; 1K"``EvNB
int i2=mid+1; KFkKr>S:
for(int cur=l;cur<=r;cur++){ H"tS33
if(i1==mid+1) 5qGRz"\p~
data[cur]=temp[i2++]; 3YR6@*!f/
else if(i2>r) Y<#WC#3=
data[cur]=temp[i1++]; 5Q^ L"&0
else if(temp[i1] data[cur]=temp[i1++]; ,pq<.?&E
else h3h2 KqM'
data[cur]=temp[i2++]; Ma0_!|i
} S92'\2
} l=`)yc.
;l[/<J
} K@Twiw~rB
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改进后的归并排序: #%il+3J
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package org.rut.util.algorithm.support; <=/v%VXPm
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import org.rut.util.algorithm.SortUtil; G0^WQQ4
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/** Yc3r3Jy
* @author treeroot DzkE*vR
* @since 2006-2-2 jX$TiG
* @version 1.0 \( LKLlam
*/ \_#0Z+pX
public class ImprovedMergeSort implements SortUtil.Sort { Psp3~Kg
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private static final int THRESHOLD = 10; aBj~370g
JR<#el
/* ;<1O86!
* (non-Javadoc) 1uG?R
* wciYv,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CeNpJ
*/ .taJCE
public void sort(int[] data) { 43W>4fsc
int[] temp=new int[data.length]; R4"["T+L`
mergeSort(data,temp,0,data.length-1); LS{g=3P0
} zU:zzT}|TZ
OY*BVJ^
private void mergeSort(int[] data, int[] temp, int l, int r) { L,!Z
int i, j, k; a\$PqOB!
int mid = (l + r) / 2; ]F r+cP
if (l == r) |{k;pfPV
return; N'+d1
if ((mid - l) >= THRESHOLD) L[)+J2_<
mergeSort(data, temp, l, mid); 2T<QG>;)j
else 7 6~x|6)
insertSort(data, l, mid - l + 1); "!i7U2M'
if ((r - mid) > THRESHOLD) :c"J$wT/
mergeSort(data, temp, mid + 1, r); c2Ua!p(c
else I1=YSi;A
insertSort(data, mid + 1, r - mid); >G92k76G
%f\ M61Z
for (i = l; i <= mid; i++) { E1_FK1*V;
temp = data; KW+ps16~
} ?d-(M' v.
for (j = 1; j <= r - mid; j++) { g><u(3
temp[r - j + 1] = data[j + mid]; !!E_WDZ#9
} [-bL>8
int a = temp[l]; W1$B6+}Z0V
int b = temp[r]; j_-$xz5-
for (i = l, j = r, k = l; k <= r; k++) { - o$S=
if (a < b) { 'D#}ce)s#
data[k] = temp[i++]; 7 a !b}
a = temp; l"p%]\tZ
} else { _|D8~\y
data[k] = temp[j--]; :!;BOCTYI
b = temp[j]; $74ZC M
} +?zyFb]Km
} EJO:3aKa
} dt{|bQLu3
<~!7?ak
/** Pk T&zSQA
* @param data W%hdS<b
* @param l RX4O1Z0
* @param i "?Wwcd\
*/ AGQCk*dm
private void insertSort(int[] data, int start, int len) { ,Ej2]iO\7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7qt<CLJ
} 1 h|cr_
} }P#%aE&-
} X0^gj>GI|
} wxB?}
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堆排序： E&}r"rbI
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package org.rut.util.algorithm.support; T5)Xl'Q
V7%G?
import org.rut.util.algorithm.SortUtil; C(b"0>
8kXbyKX[b
/** Q4{%)}2$
* @author treeroot daE/v.a4|
* @since 2006-2-2 aDb@u3X@
* @version 1.0 E D*=8s2
*/ Ij(S"P@
public class HeapSort implements SortUtil.Sort{ YN_#x
\v44Vmfz
/* (non-Javadoc) "B*a| 'n!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,w,>pO'[
*/ #R4Mv(BG
public void sort(int[] data) { I:U/%cr,
MaxHeap h=new MaxHeap(); xcnHj1r-o'
h.init(data); k:4 Zc3
for(int i=0;i h.remove(); >};,Byv!%
System.arraycopy(h.queue,1,data,0,data.length); ~` @dI
} Q~G+YjM3
xyj)W
private static class MaxHeap{ 10_eUQN
iN8?~T}w
void init(int[] data){ x9xb4ZW
this.queue=new int[data.length+1]; 'C+z
for(int i=0;i queue[++size]=data; LG'JQGl5
fixUp(size); I.r&;
} iC?s`c0B
} P0~3<h?U8
<Q/^[
private int size=0; 5u T 9ssC
5#g<L ~
private int[] queue; fO[X<|9
`J[(Dx'y=t
public int get() { G]E$U]=9r:
return queue[1]; V.)y7B
} @;qC% +^
{S%)GvrT
public void remove() { yT`[9u,
SortUtil.swap(queue,1,size--); 0aQtJ0e16
fixDown(1); kFgN^v^t
} 6[$kEKOY=
file://fixdown wYSvI
private void fixDown(int k) { 4q/E7n
int j; Fkuq'C<|Y
while ((j = k << 1) <= size) { D;Fvd:
if (j < size %26amp;%26amp; queue[j] j++; Hj |~*kG
if (queue[k]>queue[j]) file://不用交换 V]L$`7G
break; I+D`\OSL
SortUtil.swap(queue,j,k); KSIH1E
k = j; nT`NfN
} </t_<I0{
} 1iS9f~
private void fixUp(int k) { `]\4yTd
while (k > 1) { 'G>Ejh@t
int j = k >> 1; x5v^@_: jr
if (queue[j]>queue[k]) *h1Zqb
break; WGN[`D"
SortUtil.swap(queue,j,k); pu=T pSZ
k = j; %56pP"w
} Odxq]HlbO
} %\_I% yF
cE 8vSQ%
} ?u"(^93f
7IBm(#
} l~Kn-S{
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SortUtil： VXQS~#dQj
T~s/@*y9
package org.rut.util.algorithm; _bqiS]:
"M v%M2'c
import org.rut.util.algorithm.support.BubbleSort; _t6siB_u
import org.rut.util.algorithm.support.HeapSort; THJ KuWy
import org.rut.util.algorithm.support.ImprovedMergeSort; &YO5N4X~o
import org.rut.util.algorithm.support.ImprovedQuickSort; v|VY5vN
import org.rut.util.algorithm.support.InsertSort; EhEn|%S
import org.rut.util.algorithm.support.MergeSort; ABNsi$]r0
import org.rut.util.algorithm.support.QuickSort; *0{MAm
import org.rut.util.algorithm.support.SelectionSort; po*s
import org.rut.util.algorithm.support.ShellSort; q?[{fcNh$
d%1S6eYa'
/** G(JvAe]r
* @author treeroot Q}^ n
* @since 2006-2-2 \-GV8A2:k
* @version 1.0 (*&6XTV(
*/ 6NbIT[LvT
public class SortUtil { *D~@xypy
public final static int INSERT = 1; Id]WKL:
public final static int BUBBLE = 2; SjKIn-
public final static int SELECTION = 3; 3 C=nC
public final static int SHELL = 4; _8\Uukm
public final static int QUICK = 5; kOVx]=
public final static int IMPROVED_QUICK = 6; K).X=2gjY
public final static int MERGE = 7; 6'(5pt
public final static int IMPROVED_MERGE = 8; y 97QqQ^
public final static int HEAP = 9; $LAaG65V
$Pzvv`f*
public static void sort(int[] data) { wC!(STu
sort(data, IMPROVED_QUICK); a: iIfdd4'
} hOfd<k\A
private static String[] name={ +hY/4Tx<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gwThhwR
}; :KgLjhj|)
AbZ:AJ(
private static Sort[] impl=new Sort[]{ X^_,`H@
new InsertSort(), 1k2Ck
new BubbleSort(), vH# US
new SelectionSort(), "M7ry9dDH
new ShellSort(), A&$!s)8z
new QuickSort(), H b]
new ImprovedQuickSort(), o4Fh`?d}
new MergeSort(), mb0${n~fz
new ImprovedMergeSort(), IL3,dad'^
new HeapSort() 8PXleAn
}; VOG DD@
$Y$!nPO
public static String toString(int algorithm){ 2s-f?WetbP
return name[algorithm-1]; i= ~HXr}
} jA=uK6m
GuM-H$,
public static void sort(int[] data, int algorithm) { XS9k&~)*
impl[algorithm-1].sort(data); GJ%It.
} RK'3b/T
m oFK/5cJ
public static interface Sort { 5PKv@Mk
public void sort(int[] data); =_%:9FnQ0
} wIxLr{
K_]LK
public static void swap(int[] data, int i, int j) { TUy*wp9
int temp = data; UT+\IzL
data = data[j]; Yr-,0${m
data[j] = temp; k49CS*I
} X%`8h_
} s<:"rw`