[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; #R@{Bu=C
} ?-Fp rC
int i1=l; Lylw('zZ
int i2=mid+1; J'|qFS
for(int cur=l;cur<=r;cur++){ 8 yQjB-,#
if(i1==mid+1) yX?& K}JI
data[cur]=temp[i2++]; ]k5l]JB
else if(i2>r) //Ck1cI#h
data[cur]=temp[i1++]; B$sB1M0q
else if(temp[i1] data[cur]=temp[i1++]; ggfL d r
else 6;k#|-GU&
data[cur]=temp[i2++]; $s$z"<
} 8NWvi%g
} pl%3RVpoc
x)h5W+$
} #O* ytZ
3w#kvtDVm
改进后的归并排序: +-1t]`9k4
(@>X!]{$
package org.rut.util.algorithm.support; x<4-Q6'{S
nJNdq`y2
import org.rut.util.algorithm.SortUtil; Rcfh*"k
Q3*@m
/** !0{":4\
* @author treeroot ANZD7v6a
* @since 2006-2-2 TIYI\/a\;
* @version 1.0 (g*2OS
*/ Vnlns2pQl
public class ImprovedMergeSort implements SortUtil.Sort { UF3WpA
aPWlV= oG
private static final int THRESHOLD = 10; _py%L+&{
;"Q{dOvp
/* ;JFy 8Rj
* (non-Javadoc) QG$LbuZ`
* Tn8Z2iC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dUyit-
*/ q;1]M[&
public void sort(int[] data) { !inonR
int[] temp=new int[data.length]; :Em[>XA
mergeSort(data,temp,0,data.length-1); [RTB|0Q
} 9K-=2hvv
q4C$-W%rj
private void mergeSort(int[] data, int[] temp, int l, int r) { t ]7>' U
int i, j, k; sFqZ@t}~
int mid = (l + r) / 2; ;Z\jX[H
if (l == r) -Xb]=Yf-
return; < {$zOF}
if ((mid - l) >= THRESHOLD) e?rp$kq7
mergeSort(data, temp, l, mid); nJ<h}*[
else >r6`bh [4
insertSort(data, l, mid - l + 1); 2&S*> (
if ((r - mid) > THRESHOLD) T.]+T[}!
mergeSort(data, temp, mid + 1, r); ]#z^[XG
else 3iMh)YH5b
insertSort(data, mid + 1, r - mid); M#c.(QdF
BrcT`MM[(=
for (i = l; i <= mid; i++) { o|FRG{TJ
temp = data; sS7r)HV&GI
} Q&S\?cKe
for (j = 1; j <= r - mid; j++) { HdQd =q(
temp[r - j + 1] = data[j + mid]; pHSq,XP-
} Y;JV9{j
int a = temp[l]; 1A^~gYr
int b = temp[r]; F?TxViL
for (i = l, j = r, k = l; k <= r; k++) { #0V$KC*>
if (a < b) { H48`z'o
data[k] = temp[i++]; [R:\
a = temp; Q{F*%X
} else { ,g\%P5
data[k] = temp[j--]; aVcQ
b = temp[j]; +dIDFSd
} !c,=%4Pb
} J-yj&2
} @5jJoy(mX@
c~bi ~ f
/** 3}V`]B#a
* @param data *Y(v!x \L
* @param l t4>%<'>e
* @param i DA;,)A&=Q
*/ frV*+
private void insertSort(int[] data, int start, int len) { GZXBzZ}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }+";W)R
} s}yJkQb
} _EMq"\ND
} ) inhPd
} R+,eXjz"
A<-Prvryt
堆排序： xdw"JS}
jzCSxuZ7O
package org.rut.util.algorithm.support; ]gI>ay"\QA
"BSSA%u?c
import org.rut.util.algorithm.SortUtil; G=?2{c}U
&-^|n*=g6
/** 6~g`B<(?
* @author treeroot mHcxK@qw
* @since 2006-2-2 .u[hK
* @version 1.0 Z+%Uwj
*/ TTB1}j+V6
public class HeapSort implements SortUtil.Sort{ H{}0-0o
F-K=Otj
/* (non-Javadoc) 7g@P$e]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oS3}xT" U
*/ %g1{nGah
public void sort(int[] data) { LvP{"K;
MaxHeap h=new MaxHeap(); qbu>YTj
h.init(data); =~;SUO
for(int i=0;i h.remove(); `U:W(\L
System.arraycopy(h.queue,1,data,0,data.length); K5X,J/n
} .1F(-mLd
FtBYPSGz
private static class MaxHeap{ g-B~"tp
o#(z*v@
void init(int[] data){ ] Tc!=SV
this.queue=new int[data.length+1]; 8Q $fXB
for(int i=0;i queue[++size]=data; A4!IbJD,0
fixUp(size); Vq[L4
} NyHHK8>
} %C&HR2
`LD#fg*
private int size=0; 8S;]]*cD~
;O8Uc&:P
private int[] queue; P_:A%T
l!Bc0
public int get() { :=J~t@
return queue[1]; w[g(8#*
} yO@KjCv"
}` &an$Mu
public void remove() { wPhN_XV
SortUtil.swap(queue,1,size--); ,SEC~)L
fixDown(1); G/Ll4 :
} B+e$S%HV
file://fixdown R7'a/
private void fixDown(int k) { Vp3r
int j; |Ld/{&Qr
while ((j = k << 1) <= size) { vfb~S~|U6g
if (j < size %26amp;%26amp; queue[j] j++; B(}u:[ b^S
if (queue[k]>queue[j]) file://不用交换 <hG=0Zcr
break; KIt:ytFx
SortUtil.swap(queue,j,k); dQhh,}
k = j; DK2m(9/`3
} +(>!nsf
} 5p9zl=mT
private void fixUp(int k) { ;Dl< GW3<
while (k > 1) { *eE&ptx1
int j = k >> 1; Obl']Hr{y9
if (queue[j]>queue[k]) :]?y,e%xu,
break; RRYm.dMIw
SortUtil.swap(queue,j,k); `o7m)T')
k = j; 8<z]rLQw?%
} }(}+I}&~
} zj G>=2
IfyyA
} <@;Y.76~
Rg/*)SKj
} :H}a/ x*ur
6.]x@=Wm
SortUtil： kbij Zj{
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package org.rut.util.algorithm; &[]0yNG
Fi8'3/q-^
import org.rut.util.algorithm.support.BubbleSort; `Qzga}`"]
import org.rut.util.algorithm.support.HeapSort; Vq7L:,N9
import org.rut.util.algorithm.support.ImprovedMergeSort; 9C-!I,
import org.rut.util.algorithm.support.ImprovedQuickSort; -8-BVU
import org.rut.util.algorithm.support.InsertSort; Vwj^h
import org.rut.util.algorithm.support.MergeSort; Qg dHIMY
import org.rut.util.algorithm.support.QuickSort; YHoj^=/b
import org.rut.util.algorithm.support.SelectionSort; g[P.lpi{U
import org.rut.util.algorithm.support.ShellSort; L,I5/K6
-C9_gZ
/** a-I3#3VJ@
* @author treeroot Vq)6+n8o
* @since 2006-2-2 {?-@`FR-
* @version 1.0 .SdHFWx
*/ 4AI\'M"d
public class SortUtil { n}8J-/(|+
public final static int INSERT = 1; m@K5eh
public final static int BUBBLE = 2; ~=W|I:@
public final static int SELECTION = 3; ym,UJs&
public final static int SHELL = 4; n<C4-'^U[a
public final static int QUICK = 5; #lA8yWxr
public final static int IMPROVED_QUICK = 6; &w{""'
public final static int MERGE = 7; kYxb@Zn=|
public final static int IMPROVED_MERGE = 8; M[wd.\ %
public final static int HEAP = 9; &_Py{Cv@Dw
e}qG_*
public static void sort(int[] data) { [UJC/GtjS
sort(data, IMPROVED_QUICK); fV[(s7vW
} @=KuoIV
private static String[] name={ +8+@Az[e0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2FHWOy /N@
}; 8= jl]q$<
e=b>:n
private static Sort[] impl=new Sort[]{ qMD!No
new InsertSort(), W}6(;tI
new BubbleSort(), _sU|<1
new SelectionSort(), l V[d`%(
new ShellSort(), {3RY4HVT?
new QuickSort(), `N0Mm7
new ImprovedQuickSort(), 'n>,+,&
new MergeSort(), L4th 7#
new ImprovedMergeSort(), ]fH U/%
new HeapSort() "*o54z5"
}; y(M-
_I;+p eq
public static String toString(int algorithm){ dQfVdqg
return name[algorithm-1]; %j],6wW5J
} xpo<1Sr>S
= ;sEi:HC
public static void sort(int[] data, int algorithm) { (;1FhIi&
impl[algorithm-1].sort(data); :[#g_*G@p
} #V4kT*2P)
cU\Er{ k
public static interface Sort { <{rRcFR
public void sort(int[] data); t#s?:
} Y,O)"6ev
R:+2}kS5e{
public static void swap(int[] data, int i, int j) { ]w!gv /;
int temp = data; ,fS}cpV
data = data[j]; 3`@alhD'
data[j] = temp; (eS/Q%ZGK
} KjR^6v
} w*.q t<rH)