[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; Nu0C;B66
} |Z|-q"Rf
int i1=l; N"pc,Q\xU
int i2=mid+1; T]R|qlZ
for(int cur=l;cur<=r;cur++){ 5/q}`T9i%7
if(i1==mid+1) cCSs
data[cur]=temp[i2++]; fWCo;4<5?
else if(i2>r) x5|I
data[cur]=temp[i1++]; xN>npP
else if(temp[i1] data[cur]=temp[i1++]; GX)u|g
else Yab%/z2:
data[cur]=temp[i2++]; _A M*@|p,
} l3KVW5-!gS
} !xzeMVI
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} u9:`4b
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改进后的归并排序: sWQfr$^A
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package org.rut.util.algorithm.support; &Q9qq~
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import org.rut.util.algorithm.SortUtil; jPC[_g
8J*"%C$qe
/** TIx|L
* @author treeroot Eou~P h*t
* @since 2006-2-2 CWf /H)~
* @version 1.0 a[v0%W ]u
*/ 5uGqX"
public class ImprovedMergeSort implements SortUtil.Sort { ZWii)0'PV
t#yk->,
private static final int THRESHOLD = 10; O1rvaOlr
~Xw"}S5
/* -B>++r2A^
* (non-Javadoc) 5(Cl1Yse=r
* JHW"-b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zvhsyz|
*/ JBD7h5|Lc
public void sort(int[] data) { ,f kcp]}
int[] temp=new int[data.length]; !*/*8re
mergeSort(data,temp,0,data.length-1); Jx_cf9{
} 9lTv
y6@0O%TDN
private void mergeSort(int[] data, int[] temp, int l, int r) { Q0$8j-1I
int i, j, k; T`/AY?#
int mid = (l + r) / 2; >@BnV{ d
if (l == r) ,V'o4]H
return; F^l[GdUosK
if ((mid - l) >= THRESHOLD) Y4%:7mw~=
mergeSort(data, temp, l, mid); DDvh4<Hk
else sJ\BF
insertSort(data, l, mid - l + 1); HPpR.
if ((r - mid) > THRESHOLD) SEORSS
mergeSort(data, temp, mid + 1, r); h}-3\8 >
else BK*x] zG$
insertSort(data, mid + 1, r - mid); @<<<C?CTv
M])ZK
for (i = l; i <= mid; i++) { )W|w C#
temp = data; ?8HHA:GP
} "-y-iJ
for (j = 1; j <= r - mid; j++) { < |e,05aM
temp[r - j + 1] = data[j + mid]; p$SX
} r)qnl9?;`]
int a = temp[l]; JgG$?n\
int b = temp[r]; agkA}O
for (i = l, j = r, k = l; k <= r; k++) { 5NBV[EP
if (a < b) { U6=..K!q
data[k] = temp[i++]; \%u3
a = temp; ]5BX:%
} else { sPd Gw~{
data[k] = temp[j--]; ,"2s`YC
b = temp[j]; siXr;/n"
} {2qFY5H
} BMhy=+\
} /{|EAd{
832v"kCD
/** ,/[6e\0~
* @param data rMXN[,|v
* @param l Z/Eb:
* @param i <wZQc
*/ =5aDM\L$&
private void insertSort(int[] data, int start, int len) { soPLA68
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?:Mr=]sD
} Qg^cf<X{i
} Kfm5i Q
} F8hw#!Aq
} XttqOf
hZ[E7=NTQ^
堆排序： -7m:91x
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package org.rut.util.algorithm.support; OtSL*'7>
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import org.rut.util.algorithm.SortUtil; J~=n`pW
>oea{u
/** )S`jFQ1
* @author treeroot yphS'AG
* @since 2006-2-2 ^L0d/,ik
* @version 1.0 )iq-yjO6
*/ j0Bu-sO$w
public class HeapSort implements SortUtil.Sort{ W8Q|$ZJ88F
og4UhP^UET
/* (non-Javadoc) ?MXejEC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .id)VF-l
*/ NxSu3e~PS
public void sort(int[] data) { +U_=*"@|
MaxHeap h=new MaxHeap(); *Kyw^DI
h.init(data); f5F@^QXQ
for(int i=0;i h.remove(); F1iGMf-8
System.arraycopy(h.queue,1,data,0,data.length); 8iW;y2qF
} -r#X~2tPzD
whonDG4WP
private static class MaxHeap{ @vpf[j
M@h|bN
void init(int[] data){ CQwL|$)]Y
this.queue=new int[data.length+1]; G,TM-l_uw
for(int i=0;i queue[++size]=data; qe#P?[
fixUp(size); 17D"cP
} !) S ?m
} ~n[d4qV&
CQZgMY1{
private int size=0; 0_k'.5l%
&GNxo$CG
private int[] queue; v4?x.I
} $uxJB
public int get() { Mb"J@5P[4
return queue[1]; aqYa{hXio
} :k7uGD
6`!Fv-
public void remove() { 6Ztq
SortUtil.swap(queue,1,size--); !(qsD+
fixDown(1); t^`O{m<
} 6``'%S'#
file://fixdown z?>D_NLX6
private void fixDown(int k) { cKN$ =gd
int j; qud\K+
while ((j = k << 1) <= size) { GFfq+=se
if (j < size %26amp;%26amp; queue[j] j++; 1J6,]M
if (queue[k]>queue[j]) file://不用交换 "oWwc zzO
break; tyfTU5"x
SortUtil.swap(queue,j,k); 1mfs4
k = j; U`,0]"Qk
} FW) x:2BG
} bfA=3S"0
private void fixUp(int k) { _FXZm50\g{
while (k > 1) { XGJj3-eW{
int j = k >> 1; 3k|oK'l
if (queue[j]>queue[k]) cUqke+!
break; :gerQz4R8
SortUtil.swap(queue,j,k); kxp);
k = j; Z-8Yd6 4
} ?9! Z<H
} IGS1|
rm4.aO~-F
} wUiys/OVM
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} Au{<hQ=
^M%uV
SortUtil： +zrAG24q
AgOp.~*Z~V
package org.rut.util.algorithm; 5~Cakd]>
-:Fe7c
import org.rut.util.algorithm.support.BubbleSort; SF}<{x_
import org.rut.util.algorithm.support.HeapSort; u\LiSGePN
import org.rut.util.algorithm.support.ImprovedMergeSort; fLDg~;3
import org.rut.util.algorithm.support.ImprovedQuickSort; 90|7ArM_[
import org.rut.util.algorithm.support.InsertSort; fBgEnz/
import org.rut.util.algorithm.support.MergeSort; !_+8A/
import org.rut.util.algorithm.support.QuickSort; !Gu%U$d
import org.rut.util.algorithm.support.SelectionSort; BYTnrPA&Z;
import org.rut.util.algorithm.support.ShellSort; `(v='$6}
O=v#{[
/** smdZxFl
* @author treeroot NB\{'
* @since 2006-2-2 ]Pry>N3G5
* @version 1.0 B.g[c97
*/ y_*PQZ$c<
public class SortUtil { {88gW\GL
public final static int INSERT = 1; UbEb&9}
public final static int BUBBLE = 2; fMGbODAvY
public final static int SELECTION = 3; e%4:) IV!;
public final static int SHELL = 4; AS E91T~
public final static int QUICK = 5; >ELlnE8
public final static int IMPROVED_QUICK = 6; }"|"Q7H
public final static int MERGE = 7; e{X6i^% m_
public final static int IMPROVED_MERGE = 8; c1$ngH0
public final static int HEAP = 9; u5 {JQO
89n:)|rWq
public static void sort(int[] data) { nB%;S
sort(data, IMPROVED_QUICK); 4|mD*o
} N;A@' tu8
private static String[] name={ d0aCY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" : p{+G
}; @g2cC
hty0Rb[dH
private static Sort[] impl=new Sort[]{ XYS'.6k(
new InsertSort(), aFe`_cnG
new BubbleSort(), {K4+6p
new SelectionSort(), :C}2=
new ShellSort(), 2<`.#zIds
new QuickSort(), fV v.@HL{
new ImprovedQuickSort(), vj51 g@
new MergeSort(), hq:&wN7Q
new ImprovedMergeSort(), s@z}YH
new HeapSort() by'DQ 00
}; ]W Zq^'q.
L7= Q<D<
public static String toString(int algorithm){ !L;\cl
return name[algorithm-1]; Aub]IO~
} -b9;5eS!
$we]91(::
public static void sort(int[] data, int algorithm) { GK9/D|h4
impl[algorithm-1].sort(data); %]gn?`O
} Rw6;Z
?gO8kPg/D
public static interface Sort { za:a)U^n
public void sort(int[] data); ot`%*
} !@x+q)2
S#-wl2z
public static void swap(int[] data, int i, int j) { %'xb%`t
int temp = data; wO:Sg=,
data = data[j]; U3izvM
data[j] = temp; I=7Y]w=
} QV h4
} !eAo