[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; o~VZ%B
} `Z (`
int i1=l; Ja%isIdh
int i2=mid+1; X@~R<
for(int cur=l;cur<=r;cur++){ $oi8<8Y
if(i1==mid+1) Ga;Lm?6-
data[cur]=temp[i2++]; $ Vsf?ID
else if(i2>r) qwd T=H
data[cur]=temp[i1++]; v=YI%{tx)
else if(temp[i1] data[cur]=temp[i1++]; Gn%k#
else ,Aq |IH3j
data[cur]=temp[i2++]; KhyGz"I!@$
} W!a'KI'
} FOuPj+}F
B)&z% +
} 0-Wv$o[
v&"sTcS|
改进后的归并排序: ,.uI>
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package org.rut.util.algorithm.support; 5>h# hcL
|<LW(,|A
import org.rut.util.algorithm.SortUtil; U{3Pk0rZ
}DkdF
/** fvoPV&:
* @author treeroot ER<Z!*2
* @since 2006-2-2 snny! 0E\m
* @version 1.0 W0# VDe]>
*/ @P<Mc)o^
public class ImprovedMergeSort implements SortUtil.Sort { `=I@W
q&: t$tSS
private static final int THRESHOLD = 10; !f#[4Xw
b*cVC^{Dy
/* *Di ;Gf@
* (non-Javadoc) B|-W
* ,)t/1oQ}>^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %r:Uff@
*/ }<H0CcG
public void sort(int[] data) { DA/\[w?J
int[] temp=new int[data.length]; Bvz& p)(
mergeSort(data,temp,0,data.length-1); =UZm4=T
} <{k8 K6
?"T *{8
private void mergeSort(int[] data, int[] temp, int l, int r) { dijHi
int i, j, k; iZ2nBiQ
int mid = (l + r) / 2; R|!4klb
if (l == r) X@@7Qk
return; (.9H1aO46|
if ((mid - l) >= THRESHOLD) jp#/]>(9Z
mergeSort(data, temp, l, mid); fZ pUnc
else B..> *Xb
insertSort(data, l, mid - l + 1); zR }vw{
if ((r - mid) > THRESHOLD) [vcSt5R=
mergeSort(data, temp, mid + 1, r); uSNlI78D
else 8Y~\:3&1<
insertSort(data, mid + 1, r - mid); ~G8haN4
*En4~;l
for (i = l; i <= mid; i++) { I<$m%
temp = data; Dmn{ppfyb
} ]{pH,vk-
for (j = 1; j <= r - mid; j++) { O29GPs
temp[r - j + 1] = data[j + mid]; G8OnNI
} 8>ODtKI*
int a = temp[l]; pt9fOih[
int b = temp[r]; 8|IlJiJ~v
for (i = l, j = r, k = l; k <= r; k++) { (l:LG"sy\
if (a < b) { \Oa11c`6
data[k] = temp[i++]; .\|}5J9W
a = temp; =E:a\r
} else { wL" 2Cm
data[k] = temp[j--]; >Gr,!yP
b = temp[j]; RVa{%
} EdS7m,d
} Hr;\}
} ~{npG
0J1&6b
/** Hc-Ke1+
* @param data &^])iG,Ew
* @param l p`oHF 5
* @param i &uG@I=}TIY
*/ %CG=mTP
private void insertSort(int[] data, int start, int len) { *&rV}vVP^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Mt(;7q@1c
} 87:V-*8
} 3>buZ6vh
} 4>te>[
} j79$/ Ol
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堆排序： \%]!/&>{6
ya/pn qS
package org.rut.util.algorithm.support; hrTl:\
@z7$1pl}
import org.rut.util.algorithm.SortUtil; .jbT+hhM
qJ<Ghd`8v
/** ZTK)N
* @author treeroot ^h"F\vIpV
* @since 2006-2-2 ]Kp -2KW
* @version 1.0 8jfEvwY
*/ "AHuq%j
public class HeapSort implements SortUtil.Sort{ 'Rw*WK
/7yd&6`I
/* (non-Javadoc) y_f^ dIK*=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7N[Cs$_]
*/ u#v];6N
public void sort(int[] data) { <=PYu:]h
MaxHeap h=new MaxHeap(); YC d
h.init(data); !_j6\r=
for(int i=0;i h.remove(); {A8w~3F
System.arraycopy(h.queue,1,data,0,data.length); ;2iDa
} f&`yiy_
~`o%Y"p%rv
private static class MaxHeap{ uZ(,7>0
t-$Hti7Lk
void init(int[] data){ lhduK4u
this.queue=new int[data.length+1]; qre(3,VE5
for(int i=0;i queue[++size]=data; IyGW>g6_.
fixUp(size); khfWU
} 6eAJ>9@x
} =FXq=x%9+
t{Gc,S!]5
private int size=0; \xexl1_;
XFWo"%}w
private int[] queue; (j884bu
Qe1WT T]:I
public int get() { PW GNUNc
return queue[1]; '' Pfs<!
} ?/^x)Nm
C+Pw
public void remove() { lsRW.h,
SortUtil.swap(queue,1,size--); S]}W+BF3
fixDown(1); 2U`g[1
} H0Ck%5
file://fixdown ^ lM.lS>)
private void fixDown(int k) { wb/@g=`d
int j; eAbp5}B
while ((j = k << 1) <= size) { m15> ^i^W
if (j < size %26amp;%26amp; queue[j] j++; wGAeOD
if (queue[k]>queue[j]) file://不用交换 m$bDWxm#e
break; )>8k8E
SortUtil.swap(queue,j,k); s.jcD
k = j; m0+'BC{$u
} tY6QhhuS:
} 5u&hp
private void fixUp(int k) { "y$s`n4Mj
while (k > 1) { ThJ`-Ro
int j = k >> 1; ^<QF*!
if (queue[j]>queue[k]) QDJe:\n
break; .[>UkM0
SortUtil.swap(queue,j,k); >'2=3L^Q
k = j; uE:`Fo=y
} @8'LI8 \/
} iVqXf;eB!5
4dI=
} ]ppws3*Pa
()%;s2>F
} &(,-:"{pNR
E8PlGQ~z{d
SortUtil： xzOM\Nq?O
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package org.rut.util.algorithm; ^DOQ+
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import org.rut.util.algorithm.support.BubbleSort; DzE_p- zs
import org.rut.util.algorithm.support.HeapSort; wBIhpiJX0
import org.rut.util.algorithm.support.ImprovedMergeSort; SbN.z
import org.rut.util.algorithm.support.ImprovedQuickSort; E_j=v \
import org.rut.util.algorithm.support.InsertSort; D|E,9|=v
import org.rut.util.algorithm.support.MergeSort; W`` -/
import org.rut.util.algorithm.support.QuickSort; /D ~UK"}
import org.rut.util.algorithm.support.SelectionSort; } {<L<
import org.rut.util.algorithm.support.ShellSort; uEcK0>xp
"|W``&pM
/** i4r8146D[
* @author treeroot UA}N
* @since 2006-2-2 |t&gyj
* @version 1.0 Kzf^ras4u
*/ `beU2N
public class SortUtil { w]=c^@t_
public final static int INSERT = 1; rz]M}!>k
public final static int BUBBLE = 2; cux<7#6af
public final static int SELECTION = 3; v.Zr,Z=eV
public final static int SHELL = 4; 25/OV"Z
public final static int QUICK = 5; ^9A,j}>o-
public final static int IMPROVED_QUICK = 6; V"R,omh
public final static int MERGE = 7; cHk ?$
public final static int IMPROVED_MERGE = 8; c$52b4=a
public final static int HEAP = 9; cy!;;bB
71!'k>]h
public static void sort(int[] data) { xr).ZswQ
sort(data, IMPROVED_QUICK); `} :~,E
} |;MW98 A
private static String[] name={ >\5IB5'j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (=/}i'
}; wl:[Ad
8u4FagQ,
private static Sort[] impl=new Sort[]{ lko k2
new InsertSort(), $7'KcG
new BubbleSort(), B{\qYL/~
new SelectionSort(), ])iw|`@dJ
new ShellSort(), ;}E$>]*Yn
new QuickSort(), UJhUb)}^
new ImprovedQuickSort(), 'NDDj0Y
new MergeSort(), 31=vUS
new ImprovedMergeSort(), _&|<(m&."
new HeapSort() %r >Y)@$Vt
}; X8212[7
]d -U
public static String toString(int algorithm){ G "`t$=0
return name[algorithm-1]; }D7} %P]
} Z}s56{!.
4]mAV\1
public static void sort(int[] data, int algorithm) { }N%uQP#I
impl[algorithm-1].sort(data); j]bNOC2.L
} ;Br #e1~
.l}oxWWoS
public static interface Sort { ~Op~~ m
public void sort(int[] data); |]'0z0>
} C}8 3t~Q
k~HS_b*]d
public static void swap(int[] data, int i, int j) { hz*H,E!>
int temp = data; - j_
data = data[j]; 7o4B1YD
data[j] = temp; vfPIC!
} wH N5H
} ?QG?F9?