[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; Sj ovL@X
} 8ve-g\C8 H
int i1=l; xI<l1@
int i2=mid+1; 0s`6d;
for(int cur=l;cur<=r;cur++){ S\Z*7j3;M
if(i1==mid+1) 3Y P! B=
data[cur]=temp[i2++]; w^L`"
else if(i2>r) 0@_8JB ?E
data[cur]=temp[i1++]; XB'rh F8rl
else if(temp[i1] data[cur]=temp[i1++]; }6l:'nW
else TY]0aw2]|7
data[cur]=temp[i2++]; 4s m [y8
} /,I?"&FWc
} "pt[Nm76)8
Ie!KIU
} ZvuY]=^3
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改进后的归并排序: :/6:&7s
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package org.rut.util.algorithm.support; R.|h<bur
A#$l;M.3R
import org.rut.util.algorithm.SortUtil; +!@xH];
tic3a1
/** G,A?yM'Vw
* @author treeroot C=c&.-Nb9
* @since 2006-2-2 ]oix))'n
* @version 1.0 ->|eMV'd
*/ em'3 8L|(
public class ImprovedMergeSort implements SortUtil.Sort { fe4/[S{a
Il/`#b@h
private static final int THRESHOLD = 10; !o'a]8
]@SEOc@ j
/* wB8548C}-
* (non-Javadoc) P3bRv^
* =2Ju)!%wr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) je\]j-0$u
*/ mC]Krnx
public void sort(int[] data) { f:q2JgX
int[] temp=new int[data.length]; (|W6p%(
mergeSort(data,temp,0,data.length-1); !/2kJOSp
} #~*v*F~3
BI2'NN\
private void mergeSort(int[] data, int[] temp, int l, int r) { ,DKW_F|
int i, j, k; s/?(G L+Ae
int mid = (l + r) / 2; U&kdR+dB
if (l == r) <O9WCl
return; _z^&zuO
if ((mid - l) >= THRESHOLD) ;).QhHeg>
mergeSort(data, temp, l, mid); o) eW5s,6
else R{4[.
insertSort(data, l, mid - l + 1); sN[q.M?
if ((r - mid) > THRESHOLD) C/"Wh=h6
mergeSort(data, temp, mid + 1, r); i/N68
else DKQQZ`PF
insertSort(data, mid + 1, r - mid); -J!k|GK#MX
qB3&F pgW
for (i = l; i <= mid; i++) { S r7EcT-
temp = data; hEFn>
} >48)@sS
for (j = 1; j <= r - mid; j++) { w RTzpG4
temp[r - j + 1] = data[j + mid]; A-hWg;
} ELV$!f|u
int a = temp[l]; >*w(YB]/$V
int b = temp[r]; am WIA`n=
for (i = l, j = r, k = l; k <= r; k++) { 9hwn,=Vh)
if (a < b) { q|;+Wp?
data[k] = temp[i++]; =uR[Jewa
a = temp; /Bnh%6#ab
} else { QEL3b4Vm
data[k] = temp[j--]; M\9p-%"L
b = temp[j]; FCr>$
} z2V_nkI
} bO{wQ1)Z_
} $ "^yoL
l< |)LDq~
/** PsMCs|*
* @param data .7zdA IKW
* @param l _EZrZB
* @param i Jo ]8?U(^
*/ Jqi^Z*PuX
private void insertSort(int[] data, int start, int len) { U@?Roenn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \\Huk*Jn{
} I%G6V a@
} T%:W6fH7
} \xaK?_hv
} 3>sA_
G&*2h2,]
堆排序： E^jb#9\R
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package org.rut.util.algorithm.support; D7x"P-ie
6ax|EMw
import org.rut.util.algorithm.SortUtil; O%kX=6
/e}NZo{)g
/** ;/Dp
* @author treeroot 4h~o>(Sq
* @since 2006-2-2 pTJJ.#$CEF
* @version 1.0 c`&<"Us
*/ Fn!kest
public class HeapSort implements SortUtil.Sort{ paW7.~3 R
<Cw)S8t
/* (non-Javadoc) e[7n`ka '
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B@Q Ate7
*/ poYO
public void sort(int[] data) { V}kZowWD
MaxHeap h=new MaxHeap(); x;Jy-hMNl
h.init(data); ^i^/d#
for(int i=0;i h.remove(); =X11x)]F9
System.arraycopy(h.queue,1,data,0,data.length); y ZsC>
} /r Hd9^Y
~sSlfQWMzy
private static class MaxHeap{ PSQ5/l?\>
tQ:)j^\
void init(int[] data){ -Ug
this.queue=new int[data.length+1]; l(@UpV-
for(int i=0;i queue[++size]=data; y#Ao6Od6
fixUp(size); !$x9s'D
} Xj&fWuA
} q]Cmaf(
io$!z=W
private int size=0; T^ ^o
>?q()>l
private int[] queue; uf (`I
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public int get() { eEIa=MB*
return queue[1]; DDT)l+:XP
} Ax4nx!W,
8=H!&+aGh
public void remove() { sHSZIkB-r
SortUtil.swap(queue,1,size--); H\7Qf8s|{
fixDown(1); t%wC~1
} 1;R1Fj&
file://fixdown F{a--
private void fixDown(int k) { +v3@WdLcD
int j; C{<qc,!4
while ((j = k << 1) <= size) { @54D<Lj
if (j < size %26amp;%26amp; queue[j] j++; ON|Bpt2Qp
if (queue[k]>queue[j]) file://不用交换 18pi3i[
break; VQO6!ToKY
SortUtil.swap(queue,j,k); V^WR(Q}
k = j; n0:Y*Op
} G%w hOIFRq
} g-MaP
private void fixUp(int k) { ({g7{tUy^H
while (k > 1) { o/bmS57
int j = k >> 1; GtRc7,
if (queue[j]>queue[k]) #wL}4VN
break; j'#M'W3@
SortUtil.swap(queue,j,k); Z> jk\[
k = j; J fFOU!F\
} )54;YK
} ORhe?E]
&)@|WLW
} mrR~[533j
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} V)CS,w
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SortUtil： I^*&u,
XS5*=hv:
package org.rut.util.algorithm; I;]Q}SUsm
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import org.rut.util.algorithm.support.BubbleSort; u/3[6MIp
import org.rut.util.algorithm.support.HeapSort; #%t&f"j2
import org.rut.util.algorithm.support.ImprovedMergeSort; O`_!G`E
import org.rut.util.algorithm.support.ImprovedQuickSort; AV\6K;~
import org.rut.util.algorithm.support.InsertSort; Gj^JpG
import org.rut.util.algorithm.support.MergeSort; t{n|!T&
import org.rut.util.algorithm.support.QuickSort; <u2rb6
import org.rut.util.algorithm.support.SelectionSort; m%Ah]x;
import org.rut.util.algorithm.support.ShellSort; {//;GC*
bkfwsYZx
/** TxL;qZRY ^
* @author treeroot gPs%v`y)*D
* @since 2006-2-2 B]Vnu7
* @version 1.0 UV}\#86!
*/ W<<{}'Db/#
public class SortUtil { l<fZt#T
public final static int INSERT = 1; n]$50_@
public final static int BUBBLE = 2; 7#K%Bo2pG
public final static int SELECTION = 3; 4FK|y&p4r
public final static int SHELL = 4; 9aYDi)
public final static int QUICK = 5; HAa2q=
public final static int IMPROVED_QUICK = 6; R%)ZhG*
public final static int MERGE = 7; CG!/Lbd
public final static int IMPROVED_MERGE = 8; tmM8YN|
public final static int HEAP = 9; Jj=0{(X
l AF/O5b
public static void sort(int[] data) { ATq)8Rm\
sort(data, IMPROVED_QUICK); @]$qJFXx
} Wez"E2J`
private static String[] name={ Q2[@yRY/z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 29P vPR6
}; @* a'B=7
N<bNJD}
private static Sort[] impl=new Sort[]{ L`E^BuP/
new InsertSort(), 8SmtEV[b3
new BubbleSort(), (x7AV$N
new SelectionSort(), @.T w*t
new ShellSort(), *Jd,8B/hC
new QuickSort(), mIu-
new ImprovedQuickSort(), Fa]fSqy@;
new MergeSort(), vwZd@%BO
new ImprovedMergeSort(), {)^P_zha[9
new HeapSort() Sb_T _m
}; @bu5{b+8
v/%q*6@
public static String toString(int algorithm){ 2I!STP{!l
return name[algorithm-1]; x!rHkuH~
} u@!iByVAg
YLc 2:9
public static void sort(int[] data, int algorithm) { I{Pny/d`
impl[algorithm-1].sort(data); " bHeNWZ
} cI#2MjL
IEb"tsel
public static interface Sort { MZ_+doN
public void sort(int[] data); =}@m$g
} QInow2/u
:UuPy|>
public static void swap(int[] data, int i, int j) { 79J@`
int temp = data; D}Jhg`9
data = data[j]; F">>,Oc)U"
data[j] = temp; @ucN|r}=R
} U'iL|JRF
} USVM' ~p I