[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; ZE%YXG
} ~on(3|$
int i1=l; b(9FZ]7S
int i2=mid+1; >I=2!C1w
for(int cur=l;cur<=r;cur++){ J,b&XD@m
if(i1==mid+1) xW92ch+t
data[cur]=temp[i2++]; znJ'iVf
else if(i2>r) {d?$m*YR3`
data[cur]=temp[i1++]; 1bGopi/
else if(temp[i1] data[cur]=temp[i1++]; GguFo+YeZ
else zxp`
data[cur]=temp[i2++]; ^iQn'++Q
} 2)j0Ai%
} s3W@WH^.
{[+2n]f_G
} Q X%&~
dDnf^7q/
改进后的归并排序: [TNj;o5J
/T.KbLx~q
package org.rut.util.algorithm.support; NV#FvM/#"
VN%INUi@
import org.rut.util.algorithm.SortUtil; .L~Nq%g1
>MPr=W%E
/** g[w,!F
* @author treeroot - M,7N}z@;
* @since 2006-2-2 )#LpCM,a
* @version 1.0 5Ba[k[b^
*/ dMrd_1
public class ImprovedMergeSort implements SortUtil.Sort { 5O`dO9g}$
f-r] |k
private static final int THRESHOLD = 10; 7#wn<HDY%
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/* `_&Vt=7lG
* (non-Javadoc) RxQh2<?
* $y b4xU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q{ O% |
*/ `%j~|i)4
public void sort(int[] data) { !~h}8'a?
int[] temp=new int[data.length]; . BiCBp<
mergeSort(data,temp,0,data.length-1); Q);n<Z:X~
} GIAc?;zY
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private void mergeSort(int[] data, int[] temp, int l, int r) { nVJPR
int i, j, k; 6)BR+U
int mid = (l + r) / 2; J+f!Ar
if (l == r) WKSPBT;
return; "]\+?
if ((mid - l) >= THRESHOLD) ,~?YBLw@c
mergeSort(data, temp, l, mid); RN@ctRS
else h`3eu;5)
insertSort(data, l, mid - l + 1); a<fUI%_
if ((r - mid) > THRESHOLD) 8|$3OVS
mergeSort(data, temp, mid + 1, r); san,|yrMn
else 2ZQ}7`Y
insertSort(data, mid + 1, r - mid); sCu+Lg~f
aj}(E+
for (i = l; i <= mid; i++) { 1@lJonlF
temp = data; :\=CRaA
} +b3^.wkq
for (j = 1; j <= r - mid; j++) { r/*=%~*
temp[r - j + 1] = data[j + mid]; oP4GEr
} xai4pF-?
int a = temp[l]; YTw#JOO
int b = temp[r]; B^^r\L9
for (i = l, j = r, k = l; k <= r; k++) { K5"#~\D
if (a < b) { )*:`':_a
data[k] = temp[i++]; (< =}]v
a = temp; S~Id5T:,
} else { lvp8z)G
data[k] = temp[j--]; =V^.}WtO
b = temp[j]; B7"PIkk;
} 7-BvFEM;
} RW P<B0)
} X_v[MW
6[]]Y,Y
/** G-T0f
* @param data x\Y $+A,P
* @param l 5xOvY
* @param i VAXT{s&4>
*/ u_).f<mUdF
private void insertSort(int[] data, int start, int len) { {f{ZHi|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x=#VX\5k:
} D?Ux[Ozb
} pNRk.m]
} x1ztfJd
} F!.E5<&7=
wYlf^~#"
堆排序： J6jwBo2m
u~)`&1{%
package org.rut.util.algorithm.support; Y\0}R,]a-
pZU9^Z?~6
import org.rut.util.algorithm.SortUtil; ci+tdMA
<ioO,oS'
/** F H1Z2
* @author treeroot |g3?y/l
* @since 2006-2-2 >YUoh-]`
* @version 1.0 rhL"i^
*/ ,E.' o=Z
public class HeapSort implements SortUtil.Sort{ ] 7 _`]7p
M,5"b+mX[~
/* (non-Javadoc) !'Q -yoHKD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |A8/FU2{
*/ WF\)fc#;_o
public void sort(int[] data) { ZR\VCVH\^
MaxHeap h=new MaxHeap(); 21(p|`X
h.init(data); sFBneBub
for(int i=0;i h.remove(); 1[]&(Pa
System.arraycopy(h.queue,1,data,0,data.length); %e@HZ"V
} |!F5.%PY
A?G^\I~v
private static class MaxHeap{ !yhh8p3
aAy'\T$x.
void init(int[] data){ |T{C,"9y
this.queue=new int[data.length+1]; #Eb5:;
for(int i=0;i queue[++size]=data; f>ZyI{
fixUp(size); ^`<w&I@
} q%5eVG
} q:<{% U$
N D<HXO
private int size=0; y^;l*qq
_f6HAGDN
private int[] queue; iX\W;V
C4}*)a
public int get() { YSaJeU>@
return queue[1]; D/=5tOy
} mR;qMX)0h
@zgdq
public void remove() { SwU\ q]^|Z
SortUtil.swap(queue,1,size--); uf&N[M
fixDown(1); ^_ojR4
} HV/cc"
file://fixdown dik9 >*"|o
private void fixDown(int k) { I=;+n-
int j; wKH ::!
while ((j = k << 1) <= size) { fo4.JyBk
if (j < size %26amp;%26amp; queue[j] j++; 4 QZ?}iz
if (queue[k]>queue[j]) file://不用交换 /\)a
break; @x/T&67k
SortUtil.swap(queue,j,k); N4*G{g
k = j; :{q"G#
} z5bo_Eq
} "@9?QI}
private void fixUp(int k) { <9sO
while (k > 1) { F,5r9^,_
int j = k >> 1; [TCP-bU
if (queue[j]>queue[k]) Z`&4SH=j
break; X w.p
SortUtil.swap(queue,j,k); iVfgDo
k = j; L}m8AAkP[
} pZyQY+O
} Jl "mL
n8hRaNHl2
} y ?G_y
E\u#t$
} .`CZUKG
R<x'l=,D(
SortUtil： e:AHVepj{
A6oq.I0
package org.rut.util.algorithm; G Xt4j
uGs;}<<8
import org.rut.util.algorithm.support.BubbleSort; ~r{5`;c
import org.rut.util.algorithm.support.HeapSort; }Yv\0\~'W|
import org.rut.util.algorithm.support.ImprovedMergeSort; {m`A!qcD|
import org.rut.util.algorithm.support.ImprovedQuickSort; 0 'Vg6E]/
import org.rut.util.algorithm.support.InsertSort; s`Cy a`
import org.rut.util.algorithm.support.MergeSort; P_u|-~|\
import org.rut.util.algorithm.support.QuickSort; f+.T^es
import org.rut.util.algorithm.support.SelectionSort; d^(1TNS
import org.rut.util.algorithm.support.ShellSort; CB~Q%QLG
*MI*Rz?4
/** kbPE "urR
* @author treeroot 7a=S
* @since 2006-2-2 4Z*U}w)
* @version 1.0 OUP?p@%]<
*/ gGMWr.! 8
public class SortUtil { na^sBq?\
public final static int INSERT = 1; MuBx#M/
public final static int BUBBLE = 2; ouHu8)q'r
public final static int SELECTION = 3; _73h<|0
public final static int SHELL = 4; _j>;ipTb+
public final static int QUICK = 5; +}Av-47`h
public final static int IMPROVED_QUICK = 6; aiCn"j
public final static int MERGE = 7; 1qi@uYDug
public final static int IMPROVED_MERGE = 8; ~m*,mz
public final static int HEAP = 9; d1joVUYE
#Dfo#]k(
public static void sort(int[] data) { _8G>&K3T<
sort(data, IMPROVED_QUICK); g+PPW88P;
} TEsnNi 1
private static String[] name={ D7"p}PD>~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [i]r-|_K
}; a,7&"
@/UfDye
private static Sort[] impl=new Sort[]{ [\R>Xcu>
new InsertSort(), vVT?h
new BubbleSort(), -6sW6;Q
new SelectionSort(), Y\v-,xPm
new ShellSort(), @DC)]C2
new QuickSort(), k n8N,,+
new ImprovedQuickSort(), :c8n[+5
new MergeSort(), Lhh;2r/?78
new ImprovedMergeSort(), Y\2|x*KwvF
new HeapSort() A-CUv[pM
}; 8[ry|J
TCvSc\Q[:1
public static String toString(int algorithm){ BGzI
return name[algorithm-1]; @ \2#Dpr
} amQz^^
7-_vY[)/
public static void sort(int[] data, int algorithm) { bzi|s5!'<
impl[algorithm-1].sort(data); ;3C:%!CdA]
} ;7Oi!BC
X5g[ :QKP7
public static interface Sort { p4VSma_(
public void sort(int[] data); PNSMcakD
} Eaad,VBtU
Ml>( tec
public static void swap(int[] data, int i, int j) { (Y(E%
int temp = data; @;wzsh >o
data = data[j]; dV8iwI
data[j] = temp; p$;I'
} FbACTeB
} A<YsfDa_d