[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; /exl9Ilt]
} r.^X>?
int i1=l; em!R9J.
int i2=mid+1; z.HNb$;
for(int cur=l;cur<=r;cur++){ B1#>$"_0}=
if(i1==mid+1) k.[) R@0%
data[cur]=temp[i2++]; SfSEA^@|
else if(i2>r) Q]UYG(
data[cur]=temp[i1++]; `Kw8rG\]:
else if(temp[i1] data[cur]=temp[i1++]; J4c4Os>3
else _hL4@C
data[cur]=temp[i2++]; TbAdTmW
} pY>-N
} )}\@BtcjA]
@b\_696.
} .hNw1~Fj
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改进后的归并排序: P\6T4s
aq/Y}s?
package org.rut.util.algorithm.support; Ny7=-]N4{"
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import org.rut.util.algorithm.SortUtil; ^-*Tn
Mqf}Aiqk;
/** OrJlHMz
* @author treeroot 8yz((?LrDh
* @since 2006-2-2 ]l7\Zq
* @version 1.0 R6Z}/m
*/ vek:/'sj3p
public class ImprovedMergeSort implements SortUtil.Sort { aC Lg~g4
TIWLp
private static final int THRESHOLD = 10; yxWMatZ2
@:QdCG+
/* jP.b oj_u*
* (non-Javadoc) z/&a\`DsU
* {2gd4[:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qq7X",s
*/ 9f%y)[ \
public void sort(int[] data) { LI;EfyL
int[] temp=new int[data.length]; RHl=$Hm.%
mergeSort(data,temp,0,data.length-1); JrWBcp:Y
} !5SQN5K
a(DZGQ-as
private void mergeSort(int[] data, int[] temp, int l, int r) { ^C)TM@+
int i, j, k; rbuL@=S@*
int mid = (l + r) / 2; Y0fO.k#C^
if (l == r) ytV)!xe
return; g_U~.?Db7
if ((mid - l) >= THRESHOLD) V;hwAQbF
mergeSort(data, temp, l, mid); ._MAHBx+G
else 9}jq`xSL
insertSort(data, l, mid - l + 1); CL'Xip')T
if ((r - mid) > THRESHOLD) =Pb5b6Y@6
mergeSort(data, temp, mid + 1, r); u6Qf*_-K
else 5H:~6z
insertSort(data, mid + 1, r - mid); "3i80R\w`F
K7xWE,y
for (i = l; i <= mid; i++) { T<e7(=
temp = data; q&Tn>B
} /sT ^lf=
for (j = 1; j <= r - mid; j++) { ,Lun-aMd
temp[r - j + 1] = data[j + mid]; ^*xHy`
} ?9gTk \s?R
int a = temp[l]; g?[&0r1
int b = temp[r]; %X"m/4c8}
for (i = l, j = r, k = l; k <= r; k++) { bA<AG*
if (a < b) { 0+<eRR9-
data[k] = temp[i++]; d=Df.H+3
a = temp; ./&zO{|0]
} else { 'LbeL1ca
data[k] = temp[j--]; 95^i/6Gl!P
b = temp[j]; RE>ks[
} JYg% ~tW'
} '-PMF~~S
} bKuj po6
v"~Do+*+
/** _))I.c=v
* @param data ![@T iM
* @param l >^yc=mM(g3
* @param i ! FR%QGn1
*/ 2T@L{ql
private void insertSort(int[] data, int start, int len) { 6 tc:A5mK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {+"g':><
} C1T=O
} bbNU\r5%
} 2<'`^AO@
} p`:*mf
*!g 24
堆排序： >sQ2@"y)s2
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package org.rut.util.algorithm.support; {4: -0itG
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import org.rut.util.algorithm.SortUtil; 3a#PA4Ql
LZM,QQ
/** n1*&%d'7
* @author treeroot aUW/1nQHa
* @since 2006-2-2 l]_b;iux
* @version 1.0 IX<r5!
*/ ?C &x/2lt
public class HeapSort implements SortUtil.Sort{ OGJ=VQA
P3iA(3I24<
/* (non-Javadoc) hojHbmm4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !TP6=ks
*/ }xDB ~k
public void sort(int[] data) { }iilzE4oH#
MaxHeap h=new MaxHeap(); 2wx!Lpr<i_
h.init(data); FUaI2
for(int i=0;i h.remove(); 60GFVF]'2
System.arraycopy(h.queue,1,data,0,data.length); JbE?a[Eg?
} y(bsCsV&
=-$!:W~
private static class MaxHeap{ [kbC'Eh*
i`prv&
void init(int[] data){ Yd'H+r5b
this.queue=new int[data.length+1]; J&M1t#UN
for(int i=0;i queue[++size]=data; ;rd6ko
fixUp(size); cYGRy,'gH
} J &!B|TS
} k$C"xg2
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private int size=0; Kb}MF9?:e
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private int[] queue; JE0?@PI$
z|ves&lRa
public int get() { Hu[]h]
return queue[1]; ,I]7g4~
} OI+E (nA
BBcj=]"_
public void remove() { q"S(7xWS
SortUtil.swap(queue,1,size--); ?^|QiuU:n
fixDown(1); O -G1})$
} TfJL+a0
file://fixdown 1e/L\Y=m
private void fixDown(int k) { o]A XT8
int j; [*<.?9n)or
while ((j = k << 1) <= size) { XdpF&B&K7Q
if (j < size %26amp;%26amp; queue[j] j++; Zvxp%dES
if (queue[k]>queue[j]) file://不用交换 `)6>nPr7P
break; C1d 04Q
SortUtil.swap(queue,j,k); F) ?o,
k = j; RU6KIg{H
} `\!X}xiWd
} l]H0g[
private void fixUp(int k) { "3SWO3-x
while (k > 1) { < kz[:n:
int j = k >> 1; yO=p3PV d
if (queue[j]>queue[k]) 5:UyUB
break; x=.tiM{#
SortUtil.swap(queue,j,k); 7,*%[#-HE
k = j; tRteyNA
} ibXe"X/_
} bp#fyG"
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} &UL_bG}
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} s"i~6})K<$
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SortUtil： 4}i*cB`
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package org.rut.util.algorithm; gz;&u)
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import org.rut.util.algorithm.support.BubbleSort; ^;r+W-MQ
import org.rut.util.algorithm.support.HeapSort; SauH>
import org.rut.util.algorithm.support.ImprovedMergeSort; M;KA]fmc
import org.rut.util.algorithm.support.ImprovedQuickSort; fywvJ$HD]L
import org.rut.util.algorithm.support.InsertSort; Hd%!Nt\u
import org.rut.util.algorithm.support.MergeSort; @uM EXP
import org.rut.util.algorithm.support.QuickSort; b}@(m$W
import org.rut.util.algorithm.support.SelectionSort; b:kXNDc
import org.rut.util.algorithm.support.ShellSort; F\:(*1C
OR4!YVVQ
/** a }'->H
* @author treeroot rk|a5-i
* @since 2006-2-2 "'a* [%
* @version 1.0 iY~rne"l
*/ 02\JzBU
public class SortUtil { Qf xH9_
public final static int INSERT = 1; nNaXp*J
public final static int BUBBLE = 2; cSK&[>i)4
public final static int SELECTION = 3; .<#ATFmY
public final static int SHELL = 4; 4Po)xo
public final static int QUICK = 5; !tXZ%BP.u
public final static int IMPROVED_QUICK = 6; c0ez/q1S
public final static int MERGE = 7; q'G,!];qL
public final static int IMPROVED_MERGE = 8; [ohBPQO
public final static int HEAP = 9; ?D|\]0eN
= 96P7#%
public static void sort(int[] data) { C4\,z\Q
sort(data, IMPROVED_QUICK); hoQ7).>
} a{'Z5ail
private static String[] name={ 909md|9K3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VK:8 Nk_y
}; yz\c5
&|Np0R
private static Sort[] impl=new Sort[]{ 6CCbBA
new InsertSort(), z0bJ?~w,
new BubbleSort(), 2i7e#
new SelectionSort(), vq!uD!lr
new ShellSort(), 0F:1\9f5
new QuickSort(), %Dig)<yx
new ImprovedQuickSort(), Zy0aJN>
new MergeSort(), q,%:h`t\
new ImprovedMergeSort(), ymN!-x8q>'
new HeapSort() (Yb[)m>fQ}
}; 4!#a3=_
Dyg?F )6
public static String toString(int algorithm){ Sw[{JB;y,
return name[algorithm-1]; +&|S'7&{
} |=dC )Azs
a%vrt)Gx
public static void sort(int[] data, int algorithm) { 0?0Jz
impl[algorithm-1].sort(data); k`{7}zxS
} ArK]0$T
x@>&IBiL
public static interface Sort { c#/H:?q?a
public void sort(int[] data); :dI\z]Y(
} P\nC?!Q%c
kAA>FI6
public static void swap(int[] data, int i, int j) { s{bdl[7
int temp = data; qk/:A+
data = data[j]; I5m][~6.?
data[j] = temp; Gi2$B76<
} zj{r^D$
} &>g'$a<[