[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; y@<&A~Cl^
} uQ%3?bx)T
int i1=l; }/4),W@<
int i2=mid+1; }^ =f%EjV
for(int cur=l;cur<=r;cur++){ ?KWo1
if(i1==mid+1) FQ0PXYh
data[cur]=temp[i2++]; F<^f6z8
else if(i2>r) L^=G(op*
data[cur]=temp[i1++]; VI-6t"l
else if(temp[i1] data[cur]=temp[i1++]; -@XOe&q
else AwZz}J+
data[cur]=temp[i2++]; Ph)>;jU
} 7~SnY\B|
} e>P>DmlW
TkVqv v
} $}fY B/
mNsd&Rk'
改进后的归并排序: aMGyV"6(-6
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package org.rut.util.algorithm.support; ,20l` :
viJP6fh
import org.rut.util.algorithm.SortUtil; i.^:xZ
&UNQ4-s
/** EMDYeXpV
* @author treeroot ?Iu=os>*
* @since 2006-2-2 ff]fN:}V
* @version 1.0 OuKRaZ
*/ _M^^0kf
public class ImprovedMergeSort implements SortUtil.Sort { Z@bSkO<Y
_T_} k:&X
private static final int THRESHOLD = 10; #N;&^El
FV{XPr%
/* dkeMiLm
* (non-Javadoc) R:rols"QM
* 13 %:3W(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UY .-Qt
*/ Mcq!QaO}&
public void sort(int[] data) { 0\,!
int[] temp=new int[data.length]; t*)!BZ
mergeSort(data,temp,0,data.length-1); de;CEm<n
} "y5bODq3t
TM|PwY
private void mergeSort(int[] data, int[] temp, int l, int r) { BO8?{~i
int i, j, k; @>8{J6%\
int mid = (l + r) / 2; J/3$I
if (l == r) saDu'SmYV
return; ZUvc|5]
if ((mid - l) >= THRESHOLD) Xq<_r^
mergeSort(data, temp, l, mid); VGc.yM)& j
else V(g5Gn?
insertSort(data, l, mid - l + 1); c`/=)IO4%
if ((r - mid) > THRESHOLD) 8n:N#4Dh^
mergeSort(data, temp, mid + 1, r); }0f~hL24
else 'Hs*
insertSort(data, mid + 1, r - mid); A~^x*#q{4
"{trK?-8%
for (i = l; i <= mid; i++) { !}5rd\
temp = data; <;uM/vSi
} fsWIz1K
for (j = 1; j <= r - mid; j++) { t<j_` %`8
temp[r - j + 1] = data[j + mid]; $=`d[04
} fn.;C
int a = temp[l]; @= =)
int b = temp[r]; URt+MTU[
for (i = l, j = r, k = l; k <= r; k++) { S]Di1E^r;_
if (a < b) { -F 9xPw
data[k] = temp[i++]; AX Q.E$1g
a = temp; Z@%A(nZ_
} else { }%<_>b\
data[k] = temp[j--]; KD\sU6
b = temp[j]; 3(nnN[?N,5
} JT=ax/%Mo
} =-&h@mB;G
} |n^rI\p%
.g?D3$|K
/** >3~)2)Q
* @param data u:6R|%1fNn
* @param l 2\1bQq\
* @param i B=7maYeU
*/ cV_-Bcb
private void insertSort(int[] data, int start, int len) { wAJ=rRI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )]4=anJu@|
} u^#e7u
} ZHlHnUo
} ~B?Wg!
} d @ l
p L^3*B.Nr
堆排序： `M. I.Z_
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package org.rut.util.algorithm.support; 6eA)d#
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import org.rut.util.algorithm.SortUtil; YpRhl(|
GV28&!4sS
/** p)]x,F
* @author treeroot pf+VYZ#)
* @since 2006-2-2 tkkh<5{C
* @version 1.0 r. (}
*/ 7$t['2j3
public class HeapSort implements SortUtil.Sort{ wA)nryXV
OVc)PMp
/* (non-Javadoc) k#7A@Vb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %o{IQ4Lz#
*/ ZU;jz[}
public void sort(int[] data) { }qWB=,8HQ
MaxHeap h=new MaxHeap(); '#eT
h.init(data); 8?x:PkK
for(int i=0;i h.remove(); B#35)QI
System.arraycopy(h.queue,1,data,0,data.length); OdNcuiLa
} [N}QCy
B@VAXmCaoV
private static class MaxHeap{ g+c%J#F=
}$r]\v
void init(int[] data){ 065=I+Vo
this.queue=new int[data.length+1]; ^tI&5S]nE
for(int i=0;i queue[++size]=data; :^xNHMp!
fixUp(size); C5$?Y8B3
} Y(2Z<d
} ]VE3u_kR
i\gt @
private int size=0; T:9M|mD
*K@O3n
private int[] queue; v&3"(fp
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public int get() { 6pfkv2.}
return queue[1]; rmtCCPF?0
} B., BP
m_BpY9c]5
public void remove() { 5p5"3m;M7
SortUtil.swap(queue,1,size--); .tyV=B:h
fixDown(1); [z+YXs!N
} 6E:H
file://fixdown m}zXy\
private void fixDown(int k) { +7nvy^m
int j; vv<\LN0
while ((j = k << 1) <= size) { J^%E$s
if (j < size %26amp;%26amp; queue[j] j++; o{n#f?EA
if (queue[k]>queue[j]) file://不用交换 E}a.qM'
break; ?i\V^3S n$
SortUtil.swap(queue,j,k); ggYi7Wzsd
k = j; QZa^Cng~
} Fi\)ka\u
} pS7y3(_
private void fixUp(int k) { "wKJ8
while (k > 1) { riaL[4c
int j = k >> 1; 99,=dzm
if (queue[j]>queue[k]) (nuTfmt>
break; -eS r
SortUtil.swap(queue,j,k); g2'K3e?.%
k = j; 1&7?f
} O:RN4/17
} )=x4+)9
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} j \d)#+;
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SortUtil： 6"}F KRR
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package org.rut.util.algorithm; 0b8=94a{>
/Dt:4{aTOC
import org.rut.util.algorithm.support.BubbleSort; ui|6ih$+
import org.rut.util.algorithm.support.HeapSort; T?=]&9Y'
import org.rut.util.algorithm.support.ImprovedMergeSort; d7zZ~n
import org.rut.util.algorithm.support.ImprovedQuickSort; uk,9N
import org.rut.util.algorithm.support.InsertSort; C#1'kQO
import org.rut.util.algorithm.support.MergeSort; b].U/=Hs
import org.rut.util.algorithm.support.QuickSort; xXmlHo<D
import org.rut.util.algorithm.support.SelectionSort; I69Z'}+qz
import org.rut.util.algorithm.support.ShellSort; ]gv3|W
O*,O]Q
/** e7&RZ+s#wZ
* @author treeroot H$Pf$D$
* @since 2006-2-2 -~4kh]7%
* @version 1.0 2e3AmR@*
*/ -ik((qx_
public class SortUtil { 42-T&7k
public final static int INSERT = 1; f(!cz,y^\*
public final static int BUBBLE = 2; >qO l1]uF
public final static int SELECTION = 3; IDh`*F
public final static int SHELL = 4; &G\C[L
public final static int QUICK = 5; ;b=7m#5
public final static int IMPROVED_QUICK = 6; ]6|?H6'/`v
public final static int MERGE = 7; "SWL@}8vx
public final static int IMPROVED_MERGE = 8; ,nPnH1vb
public final static int HEAP = 9; n-qle5sj
'}(Fj2P79
public static void sort(int[] data) { w+5OI9
sort(data, IMPROVED_QUICK); n:s _2h(u
} ^"vmIC.h
private static String[] name={ O~x{p,s U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;<E?NBV^
}; ]rg-=Y k
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private static Sort[] impl=new Sort[]{ O<Ay`p5
new InsertSort(), !/|B4Yv
new BubbleSort(), Ag2Q!cq
new SelectionSort(), H/8u?OC
new ShellSort(), (R RRG;*n#
new QuickSort(), 6!*zgA5M'
new ImprovedQuickSort(), z{V#_(
new MergeSort(), Iq6EoDoq
new ImprovedMergeSort(), Dsv2p~
new HeapSort() z\K%
}; P#8lO%;
8+(wAbp
public static String toString(int algorithm){ Tgi7RAY
return name[algorithm-1]; 5N;xo??
} L6!Hv{ijn
F4Cq85#
public static void sort(int[] data, int algorithm) { }20tdD ~
impl[algorithm-1].sort(data); 2@HmZ!|Q
} O]F(vHK\
+x4*T
public static interface Sort { 4ISIg\:c*
public void sort(int[] data); pXh`o20I
} I!K-* AB
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public static void swap(int[] data, int i, int j) { T`<Tj?:^&
int temp = data; "15frr?
data = data[j]; 92b}N|u
data[j] = temp; JV/:QV
} d$?+>t/
} HFz;"s3lWM