[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; 1+{{EOZ4
} c>:wd@w
int i1=l; ywm8N%]v
int i2=mid+1; tm RXgTS
for(int cur=l;cur<=r;cur++){ k],Q9
if(i1==mid+1) rgtT~$S
data[cur]=temp[i2++]; =BAW[%1b
else if(i2>r) ryUQU^v
data[cur]=temp[i1++]; Tc`=f'pP)4
else if(temp[i1] data[cur]=temp[i1++]; peuZ&yK+"
else Ep3N&Imp
data[cur]=temp[i2++]; O$j7i:G'5
} '3DXPR^B6
} ca*DZG/
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} jrr*!^4|
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改进后的归并排序: &n}f?
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package org.rut.util.algorithm.support; }1i`6`y1
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import org.rut.util.algorithm.SortUtil; Rmt~,cW!\
][h%UrV
/** ?2{Gn-{
* @author treeroot $f=J2&D,Cz
* @since 2006-2-2 qqr?!vem6
* @version 1.0 f:|1_j
*/ tla 5B_
public class ImprovedMergeSort implements SortUtil.Sort { (G4at2YLd
Ed,~1GanY
private static final int THRESHOLD = 10; {19PL8B~}
=llvuUd\n
/* pF:$ ko
* (non-Javadoc) m6&~HfwN
* ;jvBF4Lb>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l2rd9-T
*/ #;qdY[v
public void sort(int[] data) { i&66Fi1
int[] temp=new int[data.length]; =eXU@B
mergeSort(data,temp,0,data.length-1); Yi+wC}
} )j(7]uX`
q#ClnG*
private void mergeSort(int[] data, int[] temp, int l, int r) { %D}kD6=
int i, j, k; aweV#j(y
int mid = (l + r) / 2; {V$|3m>:*
if (l == r) xPk8$1meZM
return; O%zU-_|*
if ((mid - l) >= THRESHOLD) #Z`q+@@]A
mergeSort(data, temp, l, mid); i6tf2oqO7
else M!A}NWF
insertSort(data, l, mid - l + 1); A8fOQ
if ((r - mid) > THRESHOLD) q?oP?cCw
mergeSort(data, temp, mid + 1, r); wQH<gJE/:
else (*nT(Adk
insertSort(data, mid + 1, r - mid); K>r,(zgVc
&(G\[RWp\
for (i = l; i <= mid; i++) { gk[aM~p
temp = data; nE&@Q
} 1s2>C!\
for (j = 1; j <= r - mid; j++) { EQyC1j
temp[r - j + 1] = data[j + mid]; RO VW s/
} '4Ixqb+
int a = temp[l]; 4Lh!8g=/
int b = temp[r]; eJVjuG
for (i = l, j = r, k = l; k <= r; k++) { qL&[K>2z
if (a < b) { EC6DW=
data[k] = temp[i++]; DV+xg3\(>1
a = temp; ox>^>wR*
} else { +xSHL|:b
data[k] = temp[j--]; ^aMg/.j
b = temp[j]; 5uNJx5g
} YX7L?=;.@
} *:YiimOY"
} C'+YQ]u
EXwo,?I
/** WJndoB.f[2
* @param data udF~5w H
* @param l /-ch`u md
* @param i /vde2.|
*/ w%VU/6~
private void insertSort(int[] data, int start, int len) { tl4V7!U@^z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =J]]EoX/
} ,p@y] cr
} -p&" y3<p
} `*["UER
} k\YG^I
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堆排序： axRV:w;E<
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package org.rut.util.algorithm.support; a %'the
_AYK435>N
import org.rut.util.algorithm.SortUtil; RtP2]O(F
Xy&A~F
/** 6BHXp# #z
* @author treeroot e*(!^Q1
* @since 2006-2-2 }DEg-j,F
* @version 1.0 0hNA1Fh{U
*/ Gg3,:A_ w
public class HeapSort implements SortUtil.Sort{ y$F'(b|)
AGO+p(6d=g
/* (non-Javadoc) Ae^~Cz1qz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Co_A/
*/ gQelD6c
public void sort(int[] data) { ?|C2*?hZ+
MaxHeap h=new MaxHeap(); H8^(GUhyp
h.init(data); @* jz o
for(int i=0;i h.remove(); e&F8m%t
System.arraycopy(h.queue,1,data,0,data.length); vnt%XU,,Y
} 5 +YH.4R
cLJ$M`e
private static class MaxHeap{ N1S{suic
{G0T$,'DR
void init(int[] data){ eKLZt%=
this.queue=new int[data.length+1]; `$<.pOm
for(int i=0;i queue[++size]=data; |'8Nh
fixUp(size); Nk 8B_{
} O67W&nz
} mPK:R^RjG&
o>i4CCU+
private int size=0; B6As,)RjD:
4*#18<u5
private int[] queue; H8zK$!
V)-+Fd,=
public int get() { m6K}|j
return queue[1]; |t&>5HM
} _LUhZlw
\0I_<
public void remove() { ,RI Gc US
SortUtil.swap(queue,1,size--); Y>T-af49
fixDown(1); I-)+bV G
} 4Zddw0|2
file://fixdown m@F`!qY~Y\
private void fixDown(int k) { ~&_z2|UXp
int j; T_ <@..C
while ((j = k << 1) <= size) { d-ZJL6-
if (j < size %26amp;%26amp; queue[j] j++; =sU<S,a*
if (queue[k]>queue[j]) file://不用交换 D~iz+{Q4
break; 7~%?#
SortUtil.swap(queue,j,k); 0c]/bs{}
k = j; z}9(x.I
} w"|L:8
} 0[# 3;a
private void fixUp(int k) { a=1@*ID
while (k > 1) { NC`aP0S
int j = k >> 1; nFe<w
if (queue[j]>queue[k]) vjCu4+w($Z
break; aQcleTb
SortUtil.swap(queue,j,k); $am$EU?s
k = j; Xp% v.M
} wqs?828x
} uc\Kg1{
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} hJ? O],4J
[`[|l
} #&k5d:
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SortUtil： a:`E0}C
8z`G,qh
package org.rut.util.algorithm; 4G0m\[Du
nYSiS}?S.
import org.rut.util.algorithm.support.BubbleSort; |O+H[;TB6
import org.rut.util.algorithm.support.HeapSort; 7#a-u<HF"
import org.rut.util.algorithm.support.ImprovedMergeSort; .bg~>T+<
import org.rut.util.algorithm.support.ImprovedQuickSort; \fdv]f
import org.rut.util.algorithm.support.InsertSort; `r':by0M
import org.rut.util.algorithm.support.MergeSort; D|p9qe5%
import org.rut.util.algorithm.support.QuickSort; M `M5'f
import org.rut.util.algorithm.support.SelectionSort; :#ik. D
import org.rut.util.algorithm.support.ShellSort; ^|>PA:%
n\D&!y[]F
/** P=Jo+4O
* @author treeroot RJ&RTo
* @since 2006-2-2 lh7#t#
* @version 1.0 ?4&e;83_#y
*/ vWv"
public class SortUtil { MK~8}x2K
public final static int INSERT = 1; $6 9&O
public final static int BUBBLE = 2; . iI
public final static int SELECTION = 3; KC6.Fr{
public final static int SHELL = 4; }?i0 I
public final static int QUICK = 5; `25yE/
public final static int IMPROVED_QUICK = 6; M h}m;NI
public final static int MERGE = 7; gO- _
public final static int IMPROVED_MERGE = 8; pa3{8x{9m
public final static int HEAP = 9; QO~P7r|A
uyWunpT
public static void sort(int[] data) { 2- h{N
sort(data, IMPROVED_QUICK); qgHWUwr+n
} AKfDXy
private static String[] name={ ((;!<5-`s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Eyqa?$R
}; @n /nH?L
'sKk"bi;0
private static Sort[] impl=new Sort[]{ $( kF#
new InsertSort(), "|q&ea rc
new BubbleSort(), #q$HQ&k
new SelectionSort(), ZJJY8k `
new ShellSort(), O _ gGf
new QuickSort(), v{N`.~,^
new ImprovedQuickSort(), pE0Sw}A:9
new MergeSort(), _<V)-Y
new ImprovedMergeSort(), ^ VyKd
new HeapSort() ,R\ \%
}; 3(N$nsi
NwvC[4
public static String toString(int algorithm){ ,/2Vt/lt
return name[algorithm-1]; RSRS wkC
} {\1?ZrCI&
\?-<4Bc@
public static void sort(int[] data, int algorithm) { Hzz %3}E
impl[algorithm-1].sort(data); yx[/|nZDC4
} '<)n8{3Q5w
eC4[AX6e
public static interface Sort { 8kIksy
public void sort(int[] data); 2@],ZLa
} ec;o\erPG
I$G['`XX/
public static void swap(int[] data, int i, int j) { {dlXLx!B
int temp = data; ^uc=f2=>,
data = data[j]; {}n^cq
data[j] = temp; 'JE`(xD
} V=l0(03j~
} V1zmGy