[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; q'+ARW48
} T-STM"~%
int i1=l; ]nebL{}5
int i2=mid+1; Rrry;Hr
for(int cur=l;cur<=r;cur++){ :w5g!G?z
if(i1==mid+1) oVZzvK(zR
data[cur]=temp[i2++]; Kn1;=k
else if(i2>r) L)\<7
data[cur]=temp[i1++]; 'Z.C&6_
else if(temp[i1] data[cur]=temp[i1++]; Zqe$S +u
else ?yjg\S?L
data[cur]=temp[i2++]; !LpjTMYs
} fgj$ u
} /0gr?I1wr7
2bw), W
} xSM1b5=Pu
nj;3U^
改进后的归并排序: r0[<[jEh
c;"e&tW
package org.rut.util.algorithm.support; \MmOI<Hd-
eHs38X
import org.rut.util.algorithm.SortUtil; T{^mh(3/"
Qb)c>r
/** :NWIUN
* @author treeroot /*BU5
* @since 2006-2-2 c u";rnj
* @version 1.0 2 yANf
*/ :/5GHfyj
public class ImprovedMergeSort implements SortUtil.Sort { 3V^5 4_
/({oN1X>i
private static final int THRESHOLD = 10; @XtrC|dkkE
_{#K
/* M6Xzyt|
* (non-Javadoc) 6QT&{|q=
* }ff^^7_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >jmHe^rH
*/ LVdR,'lS
public void sort(int[] data) { mejNa(D ^
int[] temp=new int[data.length]; ~4FzA,,
mergeSort(data,temp,0,data.length-1); wL:7G
} g|3bM
{j`8XWLZZN
private void mergeSort(int[] data, int[] temp, int l, int r) { L;M@]
int i, j, k; s1::\&`za
int mid = (l + r) / 2; )i:*r8*~
if (l == r) O#[bNLV
return; | Z7j s"
if ((mid - l) >= THRESHOLD) *JFkqbf
mergeSort(data, temp, l, mid); ZQKo ]Kdr
else JM/\n4ea:
insertSort(data, l, mid - l + 1); &0bq3JGW
if ((r - mid) > THRESHOLD) "HqmS
mergeSort(data, temp, mid + 1, r); zvq}7,
else OS<GAA0
insertSort(data, mid + 1, r - mid); Z]DZ:dF
=ca[*0^Z7
for (i = l; i <= mid; i++) { yO@1#
temp = data; m6K7D([f
} 2NjgLXP
for (j = 1; j <= r - mid; j++) { a]5y CBm
temp[r - j + 1] = data[j + mid]; zd$?2y8
} Hu6Qr
int a = temp[l]; .IY@Q
int b = temp[r]; ey9hrRMR
for (i = l, j = r, k = l; k <= r; k++) { Vfk"}k/do
if (a < b) { J[Mj8ee#
data[k] = temp[i++]; Ev3'EA~`
a = temp; C:^ :^y
} else { t$t'{*t( T
data[k] = temp[j--]; ND.(N'/O
b = temp[j]; I9xu3izAmR
} (b[=~Nh'
} owA8hGF
} C<9GdN
+p jB/#4
/** J> ,w},`
* @param data *3={s"a.(
* @param l v_U/0 0
* @param i &XI9%h9|
*/ -^`s#0( y^
private void insertSort(int[] data, int start, int len) { _](y<O^9yO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b5]<!~Fv:`
} T;{}bc&I
} L.-qTh^P
} AsuugcN*
} z(.,BB[
^["D>@yIR
堆排序： G~u$BV'
nr&|
package org.rut.util.algorithm.support; wexX|B^u
[Rq|;p
import org.rut.util.algorithm.SortUtil; II _CT=
XA>uCJf
/** rB]2qk`/'
* @author treeroot ~rjK*_3/
* @since 2006-2-2 tQT<1Q02i
* @version 1.0 baTd;`Pn
*/ lg )xQV
public class HeapSort implements SortUtil.Sort{ WEG!;XZ
9mXmghoCO
/* (non-Javadoc) vyWx{@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jz;{,F
*/ FwB xag:u
public void sort(int[] data) { <v_Wh@m
MaxHeap h=new MaxHeap(); rc>}3?o
h.init(data); Tyaqa0
for(int i=0;i h.remove(); @m%B>X28F
System.arraycopy(h.queue,1,data,0,data.length); !UPB4I
} WnOYU9;%
wi.E$RckD
private static class MaxHeap{ jjEu
dG~U3\!
void init(int[] data){ _PC<Td>nm
this.queue=new int[data.length+1]; $}S0LZ_H
for(int i=0;i queue[++size]=data; e8:O2!HW
fixUp(size); @44*<!da
} jG& 8`*|*
} P<[) qq@;
@~7au9.V=X
private int size=0; =2rdbq6R
@Ss W
private int[] queue; v;?W|kJ.u
uhaHY`w
public int get() { T\4>4eX-
return queue[1]; _^RN$4.R>
} O#J7GbrHO
%$)Sz[=
public void remove() { LB$0'dZU
SortUtil.swap(queue,1,size--); yD!GgnW
fixDown(1); 7iv g3*
} ER&\2,fZ
file://fixdown Ji=`XsV
private void fixDown(int k) { fn7?g
int j; #a|r ^%D
while ((j = k << 1) <= size) { o,J8n;"l
if (j < size %26amp;%26amp; queue[j] j++; V^n=@CZT9C
if (queue[k]>queue[j]) file://不用交换 %)dp a
break; x+'Ea.^
SortUtil.swap(queue,j,k); kDQE*o
k = j; l$HBYA\Qh
} /']`}*d
} &ns??:\+T
private void fixUp(int k) { ?/,V{!UTtq
while (k > 1) { ,.=7{y~
int j = k >> 1; V}2[chbl
if (queue[j]>queue[k]) Lq6nmjL
break; ~SA>$
SortUtil.swap(queue,j,k); #1}%=nAsi
k = j; @'hkU$N)
} 6Qz=g t%I=
} [?,+DY
#\xy,C'Y
} 4v5qK
4pcIH5)z
} u~'_Uqp
pR`nQM-D
SortUtil： d:]ZFk_*
{m,LpI0wG
package org.rut.util.algorithm; >8vq`,e
CSWA/#&8>
import org.rut.util.algorithm.support.BubbleSort; &i`(y>\
import org.rut.util.algorithm.support.HeapSort; wF6a*b@v
import org.rut.util.algorithm.support.ImprovedMergeSort; #X{lV]Z
import org.rut.util.algorithm.support.ImprovedQuickSort; [(8s\>T
import org.rut.util.algorithm.support.InsertSort; <5FGL96
import org.rut.util.algorithm.support.MergeSort; CL(D&8v8~
import org.rut.util.algorithm.support.QuickSort; ||7x51-yj
import org.rut.util.algorithm.support.SelectionSort; mB bGj3u;
import org.rut.util.algorithm.support.ShellSort; mL;oR4{
,]9p&xu
/** 4/S3hH
* @author treeroot mmNn,>AO!
* @since 2006-2-2 pA@R,O>zr
* @version 1.0 rT4qx2u
*/ g*4^HbVxt
public class SortUtil { _IxYnm`pc
public final static int INSERT = 1; awQB0ow'$P
public final static int BUBBLE = 2; 28}L.>5k
public final static int SELECTION = 3; 8yZs>Og?
public final static int SHELL = 4; rJ6N'vw>
public final static int QUICK = 5; (X2[}K
public final static int IMPROVED_QUICK = 6; XA69t2J~F
public final static int MERGE = 7; Ne1W!0YLK
public final static int IMPROVED_MERGE = 8; W ,]Ua]
public final static int HEAP = 9; dd6l+z
ka_R|xG\
public static void sort(int[] data) { dg0WH_#
sort(data, IMPROVED_QUICK); ,K&L/*
} }C=+Tn
private static String[] name={ :2A-;P4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?c fFJl
}; nx{X^oc8e
rC/z8m3z
private static Sort[] impl=new Sort[]{ oHV!>K_D
new InsertSort(), {p(6bsn_#]
new BubbleSort(), NVf_#p"h
new SelectionSort(), 5GJa+St?
new ShellSort(), dg(sRTi{
new QuickSort(), ^p%3@)&
new ImprovedQuickSort(), BGu<1$G
new MergeSort(), z<.6jx@
new ImprovedMergeSort(), uSxldc
new HeapSort() \x8'K
}; }tH_YF}u
HMKogGTTo
public static String toString(int algorithm){ x IL]Y7HWM
return name[algorithm-1]; Qk.[#
} 9!Fg1h=
S1i~r+jf
public static void sort(int[] data, int algorithm) { @'J[T:e
impl[algorithm-1].sort(data); #%z@yg
} 7$"5qJ{s
[zCKJR
public static interface Sort { A- #c1KU!
public void sort(int[] data); ,C'mE''x
} `yRt?UQRS
rPifiLl A>
public static void swap(int[] data, int i, int j) { |Ur$H!oe?'
int temp = data; ]<_v;Q<t
data = data[j]; s|:j~>53
data[j] = temp; bWZzb&
} eQ=6< ^KZ
} 9A\\2Zz6F