[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; +&t`"lRl&
} Jzqv6A3G
int i1=l; "u#T0
int i2=mid+1; x8L$T(^
for(int cur=l;cur<=r;cur++){ 4~;x(e@S
if(i1==mid+1) @m*^v\q<u
data[cur]=temp[i2++]; J!l/!Z>!cF
else if(i2>r) DEmU},<S
data[cur]=temp[i1++]; <B,z)c
else if(temp[i1] data[cur]=temp[i1++]; p[kEFE,%
else nP9zTa
data[cur]=temp[i2++]; ,MH9e!
} 9 U6cM-p?
} 1+P&O4>
9~AAdD
} kB41{Y -
Yo`#G-]
改进后的归并排序: lLq9)+HGN
y[ikpp#ozY
package org.rut.util.algorithm.support; "?_r?~sJx
zqd_^
import org.rut.util.algorithm.SortUtil; h/T^+U?-<
2(5HPRQ
/** Q]9g
* @author treeroot G5JZpB#o
* @since 2006-2-2 y'gIx*6B@
* @version 1.0 lIs<&-0
*/ v.wHj@
public class ImprovedMergeSort implements SortUtil.Sort { ^cQTRO|
)vO?d~x|
private static final int THRESHOLD = 10; |2oCEb1
3zV{cm0
/* B?;!j)FUtt
* (non-Javadoc) <$#;J>{WV
* n2<#]2h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +YS0yTWeX
*/ Gag=GHG
public void sort(int[] data) { (QARle(i
int[] temp=new int[data.length]; $j ZU(<4,
mergeSort(data,temp,0,data.length-1); <{ Z$!]i1
} \YV`M3O
=D1%-ym
private void mergeSort(int[] data, int[] temp, int l, int r) { lwY2zX&%)/
int i, j, k; t-, =sV
int mid = (l + r) / 2; }3{ x G+,
if (l == r) )FF3|dZ";K
return; S"*M9*8
if ((mid - l) >= THRESHOLD) *U[Nn5#?
mergeSort(data, temp, l, mid); ;cye 'E
else v61'fQ1Qg!
insertSort(data, l, mid - l + 1); q6xm#Fd'.
if ((r - mid) > THRESHOLD) K'Gv+UC*6
mergeSort(data, temp, mid + 1, r); !N, Oe<
else hB]\vA7
insertSort(data, mid + 1, r - mid); znNJ?
.{pc5eUf
for (i = l; i <= mid; i++) { :$=r^LSH
temp = data; 4[\[Ho
} w_O3];
for (j = 1; j <= r - mid; j++) { ynWF Y<VX
temp[r - j + 1] = data[j + mid]; ukZ>_ke`+
} G-vBJlt=t
int a = temp[l]; @zz4,,]
int b = temp[r]; G)vq+L5%
for (i = l, j = r, k = l; k <= r; k++) { YIb=rR[ $
if (a < b) { 3k5C;5
data[k] = temp[i++]; L=Pz0
a = temp; 3,x|w
} else { 3,Dc}$t
data[k] = temp[j--]; o.)8A8
b = temp[j]; #&L[?jEn
} xEX"pd
} {6V;$KqH6
} >= G{.H
F@+FXnz
/** { S]"-x
* @param data Xm#E99
* @param l 7Nw} }
* @param i Oa8lrP`(
*/ >?pWbL
private void insertSort(int[] data, int start, int len) { BqF%2{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5x([fG
} 7q%<JZPY
} !uoQLiH+
} zvzS$Gpe
} $]{20"
&zGf`Zi6*%
堆排序： dKKh^D`~
aGl*h"&
package org.rut.util.algorithm.support; LF2@qvwD
'dkKBLsx
import org.rut.util.algorithm.SortUtil; ZSB_OS[N
X=sC8Edx
/** 3G4N0{i
* @author treeroot -uE2h[X|
* @since 2006-2-2 ??4#)n k
* @version 1.0 LjE@[@d
*/ gM0^k6bB8
public class HeapSort implements SortUtil.Sort{ _kgGz@/p
P|:*OM p
/* (non-Javadoc) sHt PO[h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;8?i
*/ ~v /NG
public void sort(int[] data) { K`BNSdEN>
MaxHeap h=new MaxHeap(); #_A <C+[
h.init(data); $r>\y (W
for(int i=0;i h.remove(); 3)?v
System.arraycopy(h.queue,1,data,0,data.length); *{ =5AW}o
} *@EItj`
dBB;dN
private static class MaxHeap{ _tl,-}~
y<53xZi
void init(int[] data){ 3!+N}[$iy
this.queue=new int[data.length+1]; QNGICG-
for(int i=0;i queue[++size]=data; $?Et sf#*'
fixUp(size); 3@d{C^\
} gK`o;` ^
} 1l8kuwH
>.tP7=
private int size=0; [(hB%x_"
R%(ww
private int[] queue; Hy?+p{{G
JTK0#+?
public int get() { #[4MwM3
return queue[1]; VcLB0T7m\
} shjq4#9
fn!(cE|`E
public void remove() { 17itC9U
SortUtil.swap(queue,1,size--); @,Re<%\
fixDown(1); N@oNg}D&:
} wRc=;f
file://fixdown Up(Jw-.
private void fixDown(int k) { Rk1B \L|M
int j; ^m3[mY [a
while ((j = k << 1) <= size) { #Cwzk{p(
if (j < size %26amp;%26amp; queue[j] j++; <`'^rCWI?
if (queue[k]>queue[j]) file://不用交换 l$i^e|*
break; Ab"mX0n
SortUtil.swap(queue,j,k); DgJG: D{
k = j; B\/"$"
} 4\#!Gv-
} |k # ~
private void fixUp(int k) { qtx5N)J6
while (k > 1) { af:wg]g
int j = k >> 1; 75O-%9lFF
if (queue[j]>queue[k]) S.!0~KR:U
break; _n[4+S*v(
SortUtil.swap(queue,j,k); YivWvV
k = j; Ar+<n 2;[
} ]>K02SVT:
} nA!Xb'y&
) <lpI';T
} E^RPK{zO
"8bxb
} l&]Wyaz@n
,P?R 3
SortUtil： ?89ZnH2/
K3c(c%$<R
package org.rut.util.algorithm; !'-|]xx(
mXX9Aa>
import org.rut.util.algorithm.support.BubbleSort; 6l{=[\.Xa
import org.rut.util.algorithm.support.HeapSort; .szs?
import org.rut.util.algorithm.support.ImprovedMergeSort; [jOvy>2K]
import org.rut.util.algorithm.support.ImprovedQuickSort; >=|;2*9v
import org.rut.util.algorithm.support.InsertSort; ?z:Xdx\l
import org.rut.util.algorithm.support.MergeSort; ,| \62B`
import org.rut.util.algorithm.support.QuickSort; 0(uNFyIG
import org.rut.util.algorithm.support.SelectionSort; xk1pZQ8c
import org.rut.util.algorithm.support.ShellSort; ?~mw
1I'ep\`"X
/** aS7[s6
* @author treeroot Ly0U')D:
* @since 2006-2-2 A.mIqu,:
* @version 1.0 Rwy<#9R[x
*/ UE3#(:xA
public class SortUtil { Dn[iA~
public final static int INSERT = 1; 9Q!X~L|\S
public final static int BUBBLE = 2; b&Dc DX
public final static int SELECTION = 3; jY]hMQ/H
public final static int SHELL = 4; uq}>5
public final static int QUICK = 5; oEqt7l[I{
public final static int IMPROVED_QUICK = 6; [5v[Zqud
public final static int MERGE = 7; VW7 ?{EL7
public final static int IMPROVED_MERGE = 8; [@Db7]nG
public final static int HEAP = 9; C,+Sv-
1I#S?RSb
public static void sort(int[] data) { 7qyv.{+
sort(data, IMPROVED_QUICK); _;A?w8z
} YWfw%p?n"
private static String[] name={ 7VP[U,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;st$TVzkn
}; x?ajTzMv
.K`^n\T t
private static Sort[] impl=new Sort[]{ nDR)UR
new InsertSort(), =w~phn
new BubbleSort(), SI:+I4i
new SelectionSort(), {y{&tzZ
new ShellSort(), S?Y,sl+A:
new QuickSort(), ~%6GF57gC
new ImprovedQuickSort(), Q%xvS,oI
new MergeSort(), $/sQatic
new ImprovedMergeSort(), "}"Bvp^
new HeapSort() qlT'gUt=H
}; fbbk;Rq.'3
0n<t/74
public static String toString(int algorithm){ 6J|Ee1Ez
return name[algorithm-1]; EM_`` 0^
} zh hHA9
D4:c)}
public static void sort(int[] data, int algorithm) { @K 8sNPK
impl[algorithm-1].sort(data); @wWro?s'p
} [:HT=LX3
]-o0HY2
public static interface Sort { GEg8\
public void sort(int[] data); 9(%ptnya
} &Rgy/1
E7eOKNVC#
public static void swap(int[] data, int i, int j) { =YPvh]][
int temp = data; P1f?'i?J
data = data[j]; R<}Yf[TQ
data[j] = temp; |%F[.9Dp
} ub|tX 'o
} MZt~ Abt