[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; \UZGXk
} RVwS<g)~1
int i1=l; EMO{u
int i2=mid+1; 4sQm"XgE
for(int cur=l;cur<=r;cur++){ '=Zm[P,
if(i1==mid+1) ?<3 d Fb
data[cur]=temp[i2++]; fb`x1Q
else if(i2>r) c:.5@eq^
data[cur]=temp[i1++]; uBt ]4d*
else if(temp[i1] data[cur]=temp[i1++]; pIC'nO_
else +vxf_*0;
data[cur]=temp[i2++]; TBPu&+3
} I1':&l^O
} AP,ZMpw
E!1\9wzM{
} ri8=u$!
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改进后的归并排序: [>a3` 0M
K 'l-6JY-
package org.rut.util.algorithm.support; Mi|13[p{
dL%*;
import org.rut.util.algorithm.SortUtil; Fy<:iv0>t
*|W](id7e
/** wMR,r@}
* @author treeroot \h#aPG<yo
* @since 2006-2-2 B3&C&o.h
* @version 1.0 ddKP3}
*/ BT8)t.+pv
public class ImprovedMergeSort implements SortUtil.Sort { NO[A00m|OL
+&VY6(Zj+*
private static final int THRESHOLD = 10; rD <T
H%Vf$1/TF
/* vA_,TS#Bo
* (non-Javadoc) J?m/u6
* KMy"DVqE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ynM~&]fk#k
*/ o5&b'WUJ=
public void sort(int[] data) { 8,IF%Z+LI
int[] temp=new int[data.length]; e16H@
mergeSort(data,temp,0,data.length-1); t{iRCj
} tT)s,R%
3GE;:;8B
private void mergeSort(int[] data, int[] temp, int l, int r) { 1T|")D
int i, j, k; '9WTz(0?
int mid = (l + r) / 2; Yl&[_ l
if (l == r) d"?"(Q_8n
return; m85ZcyW1T
if ((mid - l) >= THRESHOLD) O-V]I0
mergeSort(data, temp, l, mid); Yh1nXkA!V
else Q<AOc\oO
insertSort(data, l, mid - l + 1); ~HGSA(
if ((r - mid) > THRESHOLD) SF;\*]["f
mergeSort(data, temp, mid + 1, r); zW#5 /*@
else fn 'n'X|
insertSort(data, mid + 1, r - mid); ]vf0f,F
^$'z#ZN1
for (i = l; i <= mid; i++) { z4BU}`;b3t
temp = data; MnFrQC
} hu0z 36
for (j = 1; j <= r - mid; j++) { _J,rql@nG<
temp[r - j + 1] = data[j + mid]; .qohHJ&
} ;303fS
int a = temp[l]; cSYCMQ1ro
int b = temp[r]; 2_u+&7
for (i = l, j = r, k = l; k <= r; k++) { Z ;rM@x
if (a < b) { H*k\C
data[k] = temp[i++]; }(u:K}8
a = temp; PRiE2Di2S
} else { kZ@UQ{>`
data[k] = temp[j--]; wg0_J<y]
b = temp[j]; 4_VgJ9@
} 5&p}^hS5
} `=hCS0F
} iYT?6Y|+
b`+yNf
/** t^MTR6y+8
* @param data AcnY6:3Y|
* @param l }G{"Mp4
* @param i Rq+7&%dy
*/ BV@q@C
private void insertSort(int[] data, int start, int len) { W*S4gPGM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7P3/Ky@6
} .yfp-n4H
} b(|&e
} :F"IOPfU5[
} <& PU%^Ha
sS{Co8EJn
堆排序： ^wZx=kas
tM\BO0
package org.rut.util.algorithm.support; =PA?6Bm
t|oIzjKE/
import org.rut.util.algorithm.SortUtil; hzqgsmT)
m,kYE9{
/** p+?`ru
* @author treeroot Dom]w.W5
* @since 2006-2-2 ,\ 1X\
* @version 1.0 KNN{2thy `
*/ I$sXbM;z=
public class HeapSort implements SortUtil.Sort{ 0/]h"5H3
D`G;C
/* (non-Javadoc) :I&y@@UG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _XP}fx7$C
*/ mYo~RXKGF
public void sort(int[] data) { L9e<hRZ$
MaxHeap h=new MaxHeap(); 3HuocwWbz
h.init(data); Jf=V<
for(int i=0;i h.remove(); u8JH~b
System.arraycopy(h.queue,1,data,0,data.length); _y6iR&&x
} UmpHae
\41/84BA
private static class MaxHeap{ .9ZK@xM&?
L / PAC
void init(int[] data){ c0e[vrP:
this.queue=new int[data.length+1]; V0A>+
for(int i=0;i queue[++size]=data; d<xi/
fixUp(size); ;k@]"&t
} ^bPpcm=
} *A48shfO
o<lmU8xB=
private int size=0; +UOVD:G
4Dzg r,V
private int[] queue; "[]oWPOj
{ly<%Q7j
public int get() { *%jtcno=Y
return queue[1]; 9xJtDdy-O
} uHacu<$=
yy/'B:g
public void remove() { Jjj;v2uSK
SortUtil.swap(queue,1,size--); Ppl :_Of
fixDown(1); j|[$P4w}U
} 3r[F1z2B
file://fixdown V[%IU'{:
private void fixDown(int k) { ,<P"\W
int j; yph@H!@
while ((j = k << 1) <= size) { aJ=)5%$6kc
if (j < size %26amp;%26amp; queue[j] j++; q0ab]g+
if (queue[k]>queue[j]) file://不用交换 cyd&bxPgj+
break; C=Fu1Hpb
SortUtil.swap(queue,j,k); k1g-%DB
k = j; l%Ke>9C
} R*cef
} W.{+0xx
private void fixUp(int k) { H~#$AD+H
while (k > 1) { U9PI#TX &O
int j = k >> 1; 'tkQz
if (queue[j]>queue[k]) MaPhG<?
break; @6~m&$R/
SortUtil.swap(queue,j,k); ;,]4A{|
k = j; k9H}nP$F
} rIB./,
} $;=^|I4E
I8@leT\9M
} J3oUtu
Ux^ue9
} {I0!q"sF
&x*l{s[
SortUtil： J80&npsO
#+Bz$CO
package org.rut.util.algorithm; }+`,AC`RM
Q: -&
import org.rut.util.algorithm.support.BubbleSort; 46 0/eW\
import org.rut.util.algorithm.support.HeapSort; gGCr~.5
import org.rut.util.algorithm.support.ImprovedMergeSort; P5G0fq7
import org.rut.util.algorithm.support.ImprovedQuickSort; Rq2bj_j
import org.rut.util.algorithm.support.InsertSort; h*<`ct xL
import org.rut.util.algorithm.support.MergeSort; .#tA .%
import org.rut.util.algorithm.support.QuickSort; !a V:T&6
import org.rut.util.algorithm.support.SelectionSort; N@Ap|`Ei
import org.rut.util.algorithm.support.ShellSort; T:%0i8p
D` cy.},L
/** 5IzCQqOPgX
* @author treeroot 8f~*T
* @since 2006-2-2 !W&|kvT^
* @version 1.0 U74L:&yLI
*/ 9_svtO]P
public class SortUtil { @S~n^v,)
public final static int INSERT = 1; \cX9!lHl
public final static int BUBBLE = 2; %sZ3Gpi
public final static int SELECTION = 3; t6e6v=.Pg
public final static int SHELL = 4; Y/m-EL
public final static int QUICK = 5; )iIsnM
public final static int IMPROVED_QUICK = 6; t vW0 W
public final static int MERGE = 7; \jZmu
public final static int IMPROVED_MERGE = 8; p[|V7K'Z
public final static int HEAP = 9; >#S}J LZ
Cv>~%<
public static void sort(int[] data) { h0 %M+g
sort(data, IMPROVED_QUICK); D=D.s)ns*
} $@^\zg1n
private static String[] name={ H%=;pD>o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5xUZeLj
}; ^f(El(w
4R01QSbd
private static Sort[] impl=new Sort[]{ fCs{%-6cP
new InsertSort(), $b^niL
new BubbleSort(), ]I/* J^
new SelectionSort(), iSX:H;
new ShellSort(), XF3lS#pt
new QuickSort(), tycVcr\(
new ImprovedQuickSort(), 1 Cz}|#U
new MergeSort(), eUu<q/FUMj
new ImprovedMergeSort(), ~(c<M>Q8
new HeapSort() :SMf (E 5
}; 1z,P"?Q
3h o'\Ysu/
public static String toString(int algorithm){ J1M9),
return name[algorithm-1]; 9}K K]m6u}
} h3\(660>$
p@DVy2,EY
public static void sort(int[] data, int algorithm) { f@Ve,i
impl[algorithm-1].sort(data); \G/ZA) t
} A2PeI"y
%[L/JJbP&Z
public static interface Sort { +-V4:@
public void sort(int[] data); r_rdd}=b'
} 1!+0]_8K
3$_- 0>
public static void swap(int[] data, int i, int j) { #w^Ot*{!N
int temp = data; *r~6R
data = data[j]; SBi4i;qD
data[j] = temp; :< ]sJfN
} u1z!OofN>
} i3(5 '