[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; ^)pY2t<^
} SLo/7$rct
int i1=l; 1ouTZ'c?
int i2=mid+1; &3J#"9_S
for(int cur=l;cur<=r;cur++){ Q[KR,k
if(i1==mid+1) x"80c(i
data[cur]=temp[i2++]; w}b+vh^3Wy
else if(i2>r) 'wt|buu-H
data[cur]=temp[i1++]; 7mNskb|
else if(temp[i1] data[cur]=temp[i1++]; ,&SJ?XAs
else 20)Il:x
data[cur]=temp[i2++]; 9@B+$~:}7
} K gX)fj
} Us5JnP5
7 '/&mX>
} t79MBgZ
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改进后的归并排序: GAlO<Mu
}tPl?P'`
package org.rut.util.algorithm.support; 0iHI"9z
s_TM!LRUcw
import org.rut.util.algorithm.SortUtil; k5YDqGn'q
TbuR?#
/** ;|y,bo@sJJ
* @author treeroot NU[{oI<a
* @since 2006-2-2 Z}wAh|N-
* @version 1.0 ! N p
*/ L\[jafb_`
public class ImprovedMergeSort implements SortUtil.Sort { enj2xye%Y
Z5=!R$4
private static final int THRESHOLD = 10; RYNzTA
fZO/HzX
/* OUPpz_y
* (non-Javadoc) (I5ra_FVs
* n6}1{\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e1-=|!U7#
*/ 3a0C<hW
public void sort(int[] data) { iC]}M
int[] temp=new int[data.length]; ;`+,gVrp
mergeSort(data,temp,0,data.length-1); |7-tUHMo[
} S}/CzQ
ajAEGD2Zq
private void mergeSort(int[] data, int[] temp, int l, int r) { wkGF&U
int i, j, k; [% jg;m
int mid = (l + r) / 2; UPC& O
if (l == r) pK`rm"6G
return; [~3p+
if ((mid - l) >= THRESHOLD) s"/8h#!zv
mergeSort(data, temp, l, mid); :FSkXe2yy0
else Q7\Ax0
insertSort(data, l, mid - l + 1); L!Ro`6|7;
if ((r - mid) > THRESHOLD) ^:0?R/A
mergeSort(data, temp, mid + 1, r); mR^D55k
else /d4xHt5a
insertSort(data, mid + 1, r - mid); *Pl[a1=o
3,?y !
for (i = l; i <= mid; i++) { 8/CGg_C1
temp = data; P/Zo
} -|lnJg4
for (j = 1; j <= r - mid; j++) { l;2bBx7vW
temp[r - j + 1] = data[j + mid]; f { ueI<
} T^'i+>F!w
int a = temp[l]; HUJ $e2[
int b = temp[r]; gLH(Wr~(a
for (i = l, j = r, k = l; k <= r; k++) { M3V[p9>
if (a < b) { J L3A/^
data[k] = temp[i++]; (F)zj<{f
a = temp; nxt1Y04,H
} else { !EFd-fk
data[k] = temp[j--]; ft7wMi
b = temp[j]; Di6:r3sEO
} QWoEo
} 8+gn Wy
} 5v3B8 @CsA
j\a?n4g -
/** 5s>9v
* @param data & mWq'h
* @param l R[V%59#{Z
* @param i ,[~EThcq
*/ y.nw6.`MR
private void insertSort(int[] data, int start, int len) { >3bpa<M_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]?r8^LyZ4
} )Q8Q#S
} IE6/ E
} ^uj+d"a)
} K!9=e7|P
>#ou8}0
堆排序： b{oNV-<&{
8,R]R=
package org.rut.util.algorithm.support; BYY>;>V
$5A XE;~{
import org.rut.util.algorithm.SortUtil; ]X5*e'
YGHWO#!Gp
/** 'G^=>=w|Nv
* @author treeroot *~vRbD$q
* @since 2006-2-2 lG{J
* @version 1.0 n0m9|T&
*/ l YhwV\3
public class HeapSort implements SortUtil.Sort{ &F:7U!
enNn*.*|
/* (non-Javadoc) %*uqtw8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]}B&-Yp
*/ j7W_%Yk|E
public void sort(int[] data) { +n:#Uf)
MaxHeap h=new MaxHeap(); pZR^ HOq
h.init(data); '!0CwZ 7
for(int i=0;i h.remove(); $^l=#tV
System.arraycopy(h.queue,1,data,0,data.length); sq^,l6es>
} +vuW9
D|S)/o6
private static class MaxHeap{ o ).pF">jh
JdAjKN
void init(int[] data){ *be+x RY
this.queue=new int[data.length+1]; 52~k:"c
for(int i=0;i queue[++size]=data; ZN?(lt)u9
fixUp(size); T>z@;5C
} C }[u[)
} 2AluH8X/
ufo?ZFq@$L
private int size=0; 'FVT"M~
qq/Cn4fN8
private int[] queue; Vg3&:g5 /
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public int get() { C{Zv.+F
return queue[1]; _#+9)*A
} ?=vwr,ir
9xz`V1mIL
public void remove() { ZO`d
SortUtil.swap(queue,1,size--); eyM3W}[S$/
fixDown(1); DXiD>1(q
} lL^7x
file://fixdown fG{oi(T
private void fixDown(int k) { q8D1MEBL`
int j; D9Z5g3s7R
while ((j = k << 1) <= size) { 5|b/G
if (j < size %26amp;%26amp; queue[j] j++; U".-C`4v
if (queue[k]>queue[j]) file://不用交换 w;_Ds
break; c1/x,1LnMf
SortUtil.swap(queue,j,k); W)_B(;$]
k = j; #-W5$1
} Xu$*ZJ5w
} LiRY-;8=
private void fixUp(int k) { n5i}J/Sa2
while (k > 1) { $@xkKe"
int j = k >> 1; Ob+&!XTp?0
if (queue[j]>queue[k]) ,..b)H5n
break; }8SHw|-
SortUtil.swap(queue,j,k); okv7@8U#p
k = j; -bE|FFU
} BO_^3Me*
} WIghP5%W
=VU2#O
} W1s|7
a$GKrc,z
} lDpi1]2
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SortUtil： $Yka\tS'
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package org.rut.util.algorithm; ox6rR
j{=%~
import org.rut.util.algorithm.support.BubbleSort; L:<'TXsRA
import org.rut.util.algorithm.support.HeapSort; GZ={G2@=I
import org.rut.util.algorithm.support.ImprovedMergeSort; #59zv=
import org.rut.util.algorithm.support.ImprovedQuickSort; g9XtE
import org.rut.util.algorithm.support.InsertSort; RHbwq]
import org.rut.util.algorithm.support.MergeSort; ;Y\,2b, xh
import org.rut.util.algorithm.support.QuickSort; OxZ:5ps
import org.rut.util.algorithm.support.SelectionSort; V*}zwms6
import org.rut.util.algorithm.support.ShellSort; OT i3T1&
5ov%(QI
/** 7w,FA
* @author treeroot [2V/v
* @since 2006-2-2 &v,p_'k
* @version 1.0 ?C35
*/ "Ycd$`{Vgt
public class SortUtil { Umg81!
public final static int INSERT = 1; ~py0Vx,F
public final static int BUBBLE = 2; AW5g (
public final static int SELECTION = 3; )AXH^&
public final static int SHELL = 4; 1o>R\g3
public final static int QUICK = 5; uW=NH;u
public final static int IMPROVED_QUICK = 6; KTt$Pt/.
public final static int MERGE = 7; #Ca's'j&f
public final static int IMPROVED_MERGE = 8; B}+9U
public final static int HEAP = 9; -FV'%X$i
T0%TeFY
public static void sort(int[] data) { /}_c7+//
sort(data, IMPROVED_QUICK); \[1CDz=}1
} ^1=|(Z/
private static String[] name={ $dZ>bXUw:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z"n'/S:q
}; o~o6S=4,}
2Z;`#{
private static Sort[] impl=new Sort[]{ > 0Twr
new InsertSort(), 9 yW~79n
new BubbleSort(), 3:~l2KIP4
new SelectionSort(), 2c"N-c&A
new ShellSort(), tFvgvx\:
new QuickSort(), !M]%8NTt2
new ImprovedQuickSort(), Ku0H?qft(
new MergeSort(), (o*e<y,}W
new ImprovedMergeSort(), L* khj3;
new HeapSort() 9QOr,~~s
}; uhTKCR~
;h,R?mU
public static String toString(int algorithm){ $ DDSN
return name[algorithm-1]; C!ZI&cD9
} w69>tC
FylWbQU9
public static void sort(int[] data, int algorithm) { 2I]]WBW#:
impl[algorithm-1].sort(data); OH$F >wO
} %rM-"6Q
JdaFY+f:
public static interface Sort { ",~ b2]ym
public void sort(int[] data); lq>*x=<
} \3t,|%v
QO5OnYh
public static void swap(int[] data, int i, int j) { "C:rTIH
int temp = data; uIYcmF\?
data = data[j]; ?-pxte8
data[j] = temp; ojN`#%X
} *oEv,I_
} W;fH&r)d@