[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; mpwh=
} OzC%6;6h
int i1=l; K-Pcew^?
int i2=mid+1; AdDR<IW
for(int cur=l;cur<=r;cur++){ 5 8;OTDR!
if(i1==mid+1) CfrO1iF
data[cur]=temp[i2++]; & }j;SK5
else if(i2>r) *< fJgc"3
data[cur]=temp[i1++]; 5WfZd
else if(temp[i1] data[cur]=temp[i1++]; CL5^>.}
else "-Nyf
data[cur]=temp[i2++]; v4rO 0y=C
} GGHeC/4
} l> H'PP~
i}>EGmv m
} NqKeQezX
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改进后的归并排序: &*O'qOO<2
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package org.rut.util.algorithm.support; :f7!?^;y>
.7Qqs=Au
import org.rut.util.algorithm.SortUtil; RJDk7{(
A-myY30
/** $d-yG553
* @author treeroot xgNV0;g,
* @since 2006-2-2 U5cbO{\3I
* @version 1.0 Z&H_+u3j
*/ }8"i~>>a
public class ImprovedMergeSort implements SortUtil.Sort { 17l?li
pg,JYn
private static final int THRESHOLD = 10; .sj/Lw}
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/* TZ n2,N
* (non-Javadoc) sLTQm*jL
* vzSjfv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YT[=o}jS
*/ ft{i6}
public void sort(int[] data) { DTi^* Wj
int[] temp=new int[data.length]; vYLspZ;S
mergeSort(data,temp,0,data.length-1); w0sy@OF
} C.uv0
xo ^|d3
private void mergeSort(int[] data, int[] temp, int l, int r) { 4UW)XLu6T7
int i, j, k; :D2GLq*\
int mid = (l + r) / 2; !]mo.zDSW5
if (l == r) Q9p2.!/C1
return; kMEXgzl
if ((mid - l) >= THRESHOLD) 3ErV" R4"$
mergeSort(data, temp, l, mid); N@'l:N'f4
else 'MyJw*%b]
insertSort(data, l, mid - l + 1); Ya<KMBi3
if ((r - mid) > THRESHOLD) q]!FFi{w;
mergeSort(data, temp, mid + 1, r); &DtI+)[|
else 6y`FW[
insertSort(data, mid + 1, r - mid); %M^Q{` :5
Ym -U{a
for (i = l; i <= mid; i++) { =/ !A
temp = data; 0@u{(m
} ~_ovQ4@
for (j = 1; j <= r - mid; j++) { }p)a7xn}
temp[r - j + 1] = data[j + mid]; yVPFH~1@\
} WoSKN7*
int a = temp[l]; hD,^mru
int b = temp[r]; hOIg7=v
for (i = l, j = r, k = l; k <= r; k++) { Rdd9JJsVd
if (a < b) { [%Dh0hOg
data[k] = temp[i++]; Bz:Hp{7&
a = temp; d|UH AX
} else { ,gkWksl9
data[k] = temp[j--]; b-c6.aKf|
b = temp[j]; h"2^` )!u
} JiA1yt
} >: @\SU
} kY4h-oZ
l`j@QP
/** >E,/|K*
* @param data n|QA\,=
* @param l QqeF
* @param i @k:@mzB7R
*/ &Dp&
private void insertSort(int[] data, int start, int len) { 9]{Ss$W3x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t[b(erO'
} B(-F|q\
} ~g~`,:Qc
} 'P&r^V\~(/
} mII8jyg*c
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堆排序： vL"noLs
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package org.rut.util.algorithm.support; zrtbk~v8y
j_zy"8Y{
import org.rut.util.algorithm.SortUtil; A>:31C
bX%4[BKP
/** eo"XHP7ja
* @author treeroot &Fmen;(
* @since 2006-2-2 OXoEA a
* @version 1.0 EScy!p\*
*/ f,-'eW/j
public class HeapSort implements SortUtil.Sort{ cZt5;"xgr]
Au )%w
/* (non-Javadoc) @$!"}xDR'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9*?YES'6
*/ c8cGIAOY)
public void sort(int[] data) { UyNP:q:
MaxHeap h=new MaxHeap(); .e S* F
h.init(data); )B5U0iIi
for(int i=0;i h.remove(); VOmS>'$
System.arraycopy(h.queue,1,data,0,data.length); $@dPIq4o;}
} _xP@kN~
n2(\pQKm
private static class MaxHeap{ 6SSrkj}U
O=Vj*G,
void init(int[] data){ 23zR0z(L
this.queue=new int[data.length+1]; -]Oi/i,{
for(int i=0;i queue[++size]=data; ck`$ `
fixUp(size); q1%xk=8
} X=JAyxY
} KH[Oqd
J8`vk#5
private int size=0; V}G;oz&>)
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private int[] queue; &gvX<X4e
mgEZiAV?
public int get() { =Ajw(I[56
return queue[1]; n]wZ7z
} .-p?skm=a
j 2Jew
public void remove() { ^F/H?V/PX
SortUtil.swap(queue,1,size--); ]G=^7O]`C!
fixDown(1); Fz_8m4
} sJLJVSv8c
file://fixdown Qhn>aeW,
private void fixDown(int k) { xx%*85<
int j; gf|&u4D
while ((j = k << 1) <= size) { 3],[6%w
if (j < size %26amp;%26amp; queue[j] j++; 2FTJxSC
if (queue[k]>queue[j]) file://不用交换 }Ot2; T
break; 54&&=NVs|
SortUtil.swap(queue,j,k); gO!:WD
k = j; *wz62p
} #!M;4~Sfx
} HG})VPBa
private void fixUp(int k) { 9'\*Ip^
while (k > 1) { SL%lY
int j = k >> 1; I[v~nY~l`
if (queue[j]>queue[k]) l8!n!sC[,
break; W#<ZaGsq
SortUtil.swap(queue,j,k); :B4X/
k = j; |Iq\ZX%q
} .n| M5X
} S 5nri(m
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} Hh<}~s
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} knu>{a}
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SortUtil： +p)kemJ~
@X0$X+]E*8
package org.rut.util.algorithm; H52] Zm
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import org.rut.util.algorithm.support.BubbleSort; s$OnQc2/
import org.rut.util.algorithm.support.HeapSort; \Ot,&Z k2
import org.rut.util.algorithm.support.ImprovedMergeSort; p< jM%fbZk
import org.rut.util.algorithm.support.ImprovedQuickSort; ais"xm<V
import org.rut.util.algorithm.support.InsertSort; [,p[%Dza
import org.rut.util.algorithm.support.MergeSort; {= l9{K`~
import org.rut.util.algorithm.support.QuickSort; 09rbu\h
import org.rut.util.algorithm.support.SelectionSort; yi3Cd@t({{
import org.rut.util.algorithm.support.ShellSort; h{M.+I$}C
@{UtS2L
/** 9.$k^|~
* @author treeroot XhJbBVS|
* @since 2006-2-2 /*{s1Zcb
* @version 1.0 |<1
*/ WJ$!W
public class SortUtil { ukRbSJ5a5
public final static int INSERT = 1; "EC,#$e%ev
public final static int BUBBLE = 2; rQPV@J]:
public final static int SELECTION = 3; L(eLxw e%
public final static int SHELL = 4; F:rT.n
public final static int QUICK = 5; !BW6l)=L
public final static int IMPROVED_QUICK = 6; ?i7}d@636
public final static int MERGE = 7; YXhxzH hPd
public final static int IMPROVED_MERGE = 8; keWqL]
public final static int HEAP = 9; 2p|[yZ
Mk@%Wuxg2
public static void sort(int[] data) { x*uQBNf=
sort(data, IMPROVED_QUICK); oefhJM!y
} jO#5ZhG
private static String[] name={ op|/_I$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ohe0}~)V
}; Y-Gqx
juQQ
private static Sort[] impl=new Sort[]{ U(cV#@Y
new InsertSort(), H$i4OQ2
new BubbleSort(), 9My |G)M6
new SelectionSort(), yb:Xjg7
new ShellSort(), { 'Db
new QuickSort(), <Sx-Ca7
new ImprovedQuickSort(), ?oX.$E?(
new MergeSort(), J}cqBk>
new ImprovedMergeSort(), 0]3#3TH
new HeapSort() Ec^x
}; hWujio/h
~ g\GC
public static String toString(int algorithm){ Gn_rf"
return name[algorithm-1]; {@c)!%2$
} xi2!__
hI{M?LQd
public static void sort(int[] data, int algorithm) { i?&g;_n^
impl[algorithm-1].sort(data); H#luG_)
} +84JvOkWi
Hki
public static interface Sort { & A%*sD6
public void sort(int[] data); P=%'2BQ{{
} b+.P4+
tz&oe
public static void swap(int[] data, int i, int j) { S0 AaJty
int temp = data; uIkB&
data = data[j]; w{1DwCLKq
data[j] = temp; MwN.Ll
} B~oc.sg
} Lgh. 1foK