[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; ph|2lLZ
} ph$&f0A6Xc
int i1=l; /[)P^L`
int i2=mid+1; |RbUmuj
for(int cur=l;cur<=r;cur++){ "~,(Xa3x
if(i1==mid+1) f*R_\
data[cur]=temp[i2++]; G%x,t-
else if(i2>r) ,~68~_)
data[cur]=temp[i1++]; oqm{<g?2
else if(temp[i1] data[cur]=temp[i1++]; ":#A>L? l
else \Jj'60L^
data[cur]=temp[i2++]; bKTwG@{/k
} )8A=yrTIT
} A<G ;
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} EXM/>PG
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改进后的归并排序: :-jP8X
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package org.rut.util.algorithm.support; cB{;Nh6"
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import org.rut.util.algorithm.SortUtil; @5nkI$>3z
7$!Bq#
/** 5'}!v
* @author treeroot F@*r%[S/
* @since 2006-2-2 ?wiq 3f6
* @version 1.0 0BU:(o&
*/ h"%,eW|^
public class ImprovedMergeSort implements SortUtil.Sort { YUE1 '}
hE3jb.s(>
private static final int THRESHOLD = 10; qcoZ2VJ hh
Sv]"Y/N
/* Z(clw
* (non-Javadoc) N`mC_)
* =P+wp{?AN|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cH8H)55F
*/ f\%X7.
public void sort(int[] data) { =GS_ G;Dz
int[] temp=new int[data.length]; 74!JPOpQH
mergeSort(data,temp,0,data.length-1); uX5B>32
} x+j/v5
LSOwa
private void mergeSort(int[] data, int[] temp, int l, int r) { 3 mMdq*X5
int i, j, k; a*ixs'MJ
int mid = (l + r) / 2; T?$?5
if (l == r) U";Rp&\3;
return; }lbx
if ((mid - l) >= THRESHOLD) &[\arwe)
mergeSort(data, temp, l, mid); '{_tDboY
else gQzF C&g
insertSort(data, l, mid - l + 1); peP:5WB
if ((r - mid) > THRESHOLD) 5;%xqdD
mergeSort(data, temp, mid + 1, r); 9<#R;eIsv
else PyJblW
insertSort(data, mid + 1, r - mid); FH@e:-*=
\$++.%0
for (i = l; i <= mid; i++) { _rWXcK3cjr
temp = data; tbt9V2U:"n
} 63\>MQcLy
for (j = 1; j <= r - mid; j++) { ,kuFTWB
temp[r - j + 1] = data[j + mid]; ="*C&wB^
} JSP8Lu"n
int a = temp[l]; < 2r#vmM
int b = temp[r]; <L[)P{jn?p
for (i = l, j = r, k = l; k <= r; k++) { H "/e%
if (a < b) { mi3q1npb7[
data[k] = temp[i++]; 8XXTN@&,
a = temp; -^%"w
} else { RB 0j!H:
data[k] = temp[j--]; = ~R3*GN
b = temp[j]; >?\ !k c
} O4+w2'.,
} Ki6BPi^
} 6}ewBAq%
/IR5[67
/** l%V}'6T
* @param data X>YOo~yS5
* @param l wH5O>4LO
* @param i x~I1(l7r
*/ VY26Cf"
private void insertSort(int[] data, int start, int len) { HCCp<2D"C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gnK!"!nL
} IBHG1<3
} Tl{r D(D
} )4O`%9=M&
} MjosA R
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堆排序： z^a?t<+
r]vBr^kq
package org.rut.util.algorithm.support; Z~:lfCK`
lP &%5y;
import org.rut.util.algorithm.SortUtil; Hw3ES
;(Va_
/** w9}IM149
* @author treeroot W..>Ny;'3
* @since 2006-2-2 Ji:@z%osr
* @version 1.0 2{qG
*/ k0=y_7 =(5
public class HeapSort implements SortUtil.Sort{ PhL5EYn
2]KPW*V
/* (non-Javadoc) :D7!6}%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DO*C]
*/ Icb;Yzt
public void sort(int[] data) { v2<gkCK^
MaxHeap h=new MaxHeap(); 745PCC'FK
h.init(data); lY,1 w
for(int i=0;i h.remove(); ~DS9{Y
System.arraycopy(h.queue,1,data,0,data.length); P?-44m#
} e=$xn3)McY
*)sz]g|d
private static class MaxHeap{ eesLTyD2_
>}tG^)os
void init(int[] data){ m$j;FKz+|
this.queue=new int[data.length+1]; ImW~Jy
for(int i=0;i queue[++size]=data; UeTp,
fixUp(size); ?=Qg
} clV/i&]Qa
} %Q01EjRes
4IpFT;`q
private int size=0; ,)m-nZ5
vUExS Z^
private int[] queue; O\{_)L
zL}DLfy>R
public int get() { uU"s50m
return queue[1]; 6!m#_z8qG3
} f2XD^:Gc
e;\c=J,eE
public void remove() { a_j#l(] 9
SortUtil.swap(queue,1,size--); p =O1aM
fixDown(1); NX/)Z&Fx:
} }e|]G,NZO
file://fixdown `&DiM@Sm
private void fixDown(int k) { !I$RE?7eY
int j; Sv",E@!f
while ((j = k << 1) <= size) { At:C4>HE@
if (j < size %26amp;%26amp; queue[j] j++; x=+H@YO\
if (queue[k]>queue[j]) file://不用交换 !9Ni[8&Fg0
break; @1X1E 2:
SortUtil.swap(queue,j,k); [#H8Mb+7
k = j; D]y.!D{l2
} 9a,CiH%@
} [X\2U4
private void fixUp(int k) { b&&'b)
while (k > 1) { w%na n=
int j = k >> 1; cE?J]5#^
if (queue[j]>queue[k]) yx4c+(J^8
break; I>|?B(F
SortUtil.swap(queue,j,k); j(N9%/4u
k = j; 81C?U5
} ]C^*C|
} <Z_`^~!
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} ~Y[b QuA=)
}x-8@9S~z
} L@uKE jR
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SortUtil： eZo%q,L
ObnB6ShKi
package org.rut.util.algorithm; \`&fr+x
A 2 )%+
import org.rut.util.algorithm.support.BubbleSort; ~d]7 Cl
import org.rut.util.algorithm.support.HeapSort; jeNEC&J
import org.rut.util.algorithm.support.ImprovedMergeSort; .$;GVJ-:5
import org.rut.util.algorithm.support.ImprovedQuickSort; Dbd5d]]n3
import org.rut.util.algorithm.support.InsertSort; F*u;'K
import org.rut.util.algorithm.support.MergeSort; c7 -j
import org.rut.util.algorithm.support.QuickSort; |&.)_+w
import org.rut.util.algorithm.support.SelectionSort; 4T-AWk
import org.rut.util.algorithm.support.ShellSort; B(U`Zd
m5*RB1
/** ^%.<(:k[L
* @author treeroot \Ld7fP
* @since 2006-2-2 chbs9y0
* @version 1.0 X+jSB,
*/ Vy VC#AK,
public class SortUtil { /PlsF
public final static int INSERT = 1; v'=APl+_
public final static int BUBBLE = 2; )i>KgX
public final static int SELECTION = 3; BGS6uV4^>
public final static int SHELL = 4; ~b/>TKn+
public final static int QUICK = 5; mB`r6'#=
public final static int IMPROVED_QUICK = 6; c{q`uI;O
public final static int MERGE = 7; W1z5|-T
public final static int IMPROVED_MERGE = 8; =nl,5^
public final static int HEAP = 9; fq'Of wT
~1oD7=WN
public static void sort(int[] data) { C_/oORvK
sort(data, IMPROVED_QUICK); a6OT2B
} P^ VNB
private static String[] name={ b6ddXM\Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9#7zjrB
}; ~gD'up@$/
V8/o@I{U[
private static Sort[] impl=new Sort[]{ nEYJ?_55
new InsertSort(), bC|~N0b
new BubbleSort(), ?CC6/bE-{
new SelectionSort(), TMrmyvv
new ShellSort(), '}=M~
new QuickSort(), 5s9~rm
new ImprovedQuickSort(), &R]G)f#w%*
new MergeSort(), g& Rk}/F
new ImprovedMergeSort(), fi)ypv*
new HeapSort() $Z4p$o dk
}; hkY E7
Fu$otMw%l
public static String toString(int algorithm){ A [JV*Dt
return name[algorithm-1]; h2nyP
} |qD<h
s.U p<Rw
public static void sort(int[] data, int algorithm) { o/xE O=AW
impl[algorithm-1].sort(data); l;ugrAo?
} !ibp/:x
e;$s{CNo
public static interface Sort { xnTky1zq
public void sort(int[] data); N Jf''e3
} *MNY1+RJ
C*$/J\6xy
public static void swap(int[] data, int i, int j) { >4c 1VEi
int temp = data; 4^r}&9C~
data = data[j]; ME.LS2'n
data[j] = temp; /[p4. FL
} ?w+T_EH
} Hs9uDGWp