[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; r3a$n$Qw
} U1?*vwfKZ
int i1=l; m&)5QX
int i2=mid+1; 4_3O?IY
for(int cur=l;cur<=r;cur++){ ,fS}cpV
if(i1==mid+1) & [)1LRt_
data[cur]=temp[i2++]; MB423{j
else if(i2>r) # 4E@y<l$
data[cur]=temp[i1++]; O[O`4de9
else if(temp[i1] data[cur]=temp[i1++]; T(@y#09
else $~UQKv>
data[cur]=temp[i2++]; fuM+{1}/E
} Kfnn;
} !6_lD0
ZM oV!lu
} @=o1q=5@8
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改进后的归并排序: FY%v \`@1*
8zew8I~s
package org.rut.util.algorithm.support; tqLn A
J{$+\
import org.rut.util.algorithm.SortUtil; k$</7IuH
Sbub|
/** jbQ2G|:Q
* @author treeroot 6x KbK1W
* @since 2006-2-2 0raVC=[
* @version 1.0 SX)giQLU
*/ l,Un7]*
public class ImprovedMergeSort implements SortUtil.Sort { }J}a;P4
8%s^>.rG
private static final int THRESHOLD = 10; `{fqnNJE
$"[1yQ<p
/* 0'!v-`.
* (non-Javadoc) P<b.;Oz__-
* M0`nr}g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6|U0"C#]
*/ &Im{p7gf!b
public void sort(int[] data) { )e.Y"5My
int[] temp=new int[data.length]; 6'y+Ev$9
mergeSort(data,temp,0,data.length-1); <VV./W8e9
} 6zs&DOB
Gv[W)+3f
private void mergeSort(int[] data, int[] temp, int l, int r) { c;_GZ}8
int i, j, k; 9`}Wp2
int mid = (l + r) / 2; QjETu
if (l == r) 6U;pYWht
return; (g,lDU[=
if ((mid - l) >= THRESHOLD) ^,zE Nqg7
mergeSort(data, temp, l, mid); Mw!?2G[|
else }J .f 5WaG
insertSort(data, l, mid - l + 1); J{' u
if ((r - mid) > THRESHOLD) >B$ZKE
mergeSort(data, temp, mid + 1, r); 9v)p0
else =W)Fa6P3j(
insertSort(data, mid + 1, r - mid); ~[XDK`B
QC0^G,9.
for (i = l; i <= mid; i++) { cSCO7L2E18
temp = data; "~x\bSY
} $Ch!]lJA
for (j = 1; j <= r - mid; j++) { 4s/4z@3a
temp[r - j + 1] = data[j + mid]; )t={+^Xe
} VKy:e.
int a = temp[l]; Db\.D/76
int b = temp[r]; 1 GUF,A+_O
for (i = l, j = r, k = l; k <= r; k++) { /6}4<~~4TA
if (a < b) { DG8]FhD^b
data[k] = temp[i++]; yA*~O$~Y
a = temp; N8(xz-6
} else { M= !Fb
data[k] = temp[j--]; LFy5tX#
b = temp[j]; Wq 7 c/|
} S!8eY `C.
} 9)l-5o:D
} N;tUrdgQ
Gxv@a
/** PCnE-$QH
* @param data %j=dKd>
* @param l E&V"z^qs_
* @param i !%J;dOcU
*/ %@q52ZQ
private void insertSort(int[] data, int start, int len) { !zLd,`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b!SGQv(^M
} ,GXwi|Y
} WwbExn<
} wl^bvHG
} leyhiL<
aKS 2p3
堆排序： wl2rw93
~R-S$qizAC
package org.rut.util.algorithm.support; (:2:_FL
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import org.rut.util.algorithm.SortUtil; DbJ:KQ!*
S%uH*&`
/** t5N@z
* @author treeroot is?`tre\P
* @since 2006-2-2 rxCEOG
* @version 1.0 )v;>6(
*/ 2<>n8K
public class HeapSort implements SortUtil.Sort{ 4;Z`u.1
&#v^y3r
/* (non-Javadoc) +l@H[r;$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CCfuz&
*/ ?XL[[vyr
public void sort(int[] data) { pl Ii
MaxHeap h=new MaxHeap(); nH}api^0A
h.init(data); (7`goi7M
for(int i=0;i h.remove(); (G<"nnjK
System.arraycopy(h.queue,1,data,0,data.length); (~xFd^W9o
} pBiC
6=A2Y:8
private static class MaxHeap{ 'VFxg,
D/:~#)
void init(int[] data){ u /JEQz1
this.queue=new int[data.length+1]; 7oA$aJQ
for(int i=0;i queue[++size]=data; cy*Td7)/
fixUp(size); h'^7xDw
} 1c&/&6#5
} T[U&Y`3g
~[Mk QJxe
private int size=0; 1c~c_Cc4
l*uNi47|
private int[] queue; $EW31R5h<s
b')CGqbbmT
public int get() { "6^tG[G%
return queue[1]; #6fp"
} (FbqKx'uq
,$Qa]UN5Q
public void remove() { \hQ[5>
SortUtil.swap(queue,1,size--); f3lFpS
fixDown(1); +N"A5U
} rOyK==8/Fg
file://fixdown |@]J*Kh
private void fixDown(int k) { C>$5<bx
int j; !jMa%;/
while ((j = k << 1) <= size) { K+dkImkh
if (j < size %26amp;%26amp; queue[j] j++; Z66akr
if (queue[k]>queue[j]) file://不用交换 LkMhS0?(T
break; t9&)9,my
SortUtil.swap(queue,j,k); PP/M-Jql)
k = j; gQ.yNe
} @Rj&9/\L
} QOlm#S
private void fixUp(int k) { UA>~xJp=
while (k > 1) { ;TF(opW:
int j = k >> 1; n*CH,fih:
if (queue[j]>queue[k]) M A}=
break; _xI'p6C
SortUtil.swap(queue,j,k); #R"9(Q&
k = j; BZQ98"Fz*
} LH"MJWOJ
} gHQ[D|zu
"u Xl
} (u@[}!
/'QNlP[L;
} {r`l
%O%+TR7Z
SortUtil： 2WIL0Siwl
a k@0M[d
package org.rut.util.algorithm; :7D&=n)
Z{EHV7
import org.rut.util.algorithm.support.BubbleSort; pM@|P,w {
import org.rut.util.algorithm.support.HeapSort; <wFR%Y/j
import org.rut.util.algorithm.support.ImprovedMergeSort; 8;4vr@EV
import org.rut.util.algorithm.support.ImprovedQuickSort; F}DdErd!f
import org.rut.util.algorithm.support.InsertSort; bENfEOf,
import org.rut.util.algorithm.support.MergeSort; (BVLlOo?J
import org.rut.util.algorithm.support.QuickSort; jx!)N>
import org.rut.util.algorithm.support.SelectionSort; Vg#s
import org.rut.util.algorithm.support.ShellSort; -i V&-oP
-?!|W-}@G=
/** +[UFf3(ON
* @author treeroot SGZOfTcY
* @since 2006-2-2 VW<s_
* @version 1.0 {lT9gJ+
*/ l:a+o gm3
public class SortUtil { gd]vrW'wj
public final static int INSERT = 1; )@ZJ3l.
public final static int BUBBLE = 2; }IC$Du#
public final static int SELECTION = 3; $7a| 9s0
public final static int SHELL = 4; W=j/2c/
public final static int QUICK = 5; j?i Ur2
public final static int IMPROVED_QUICK = 6; Kf76./
public final static int MERGE = 7; W'E!5T^
public final static int IMPROVED_MERGE = 8; (?J6vK}S
public final static int HEAP = 9; j2cLb
}Y(Q7l
public static void sort(int[] data) { hqnJ@N$yY
sort(data, IMPROVED_QUICK); Cfyas'
} k~>9,=::d
private static String[] name={ n&iWYECz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fGcAkEstT!
}; jC*(ZF1B
SIKy8?Fn
private static Sort[] impl=new Sort[]{ V2ypmkn8&
new InsertSort(), QUaz;kNC7
new BubbleSort(), Y$--Hp4
new SelectionSort(), vz)A~"E
new ShellSort(), GIWgfE?
new QuickSort(), ?Mp~^sgp'
new ImprovedQuickSort(), /_rQ>PgSZW
new MergeSort(), ]}<.Y[!S
new ImprovedMergeSort(), n4 KiC!*i0
new HeapSort() /SY40;k:
}; U)zd~ug?m
$G"PZ7
public static String toString(int algorithm){ 1(gb-u0
return name[algorithm-1]; A]Zp1XEG
} h.%VWsAO7
D=mU!rjr1
public static void sort(int[] data, int algorithm) { X;w1@4!
impl[algorithm-1].sort(data); ?Gp~i]
} \u2K?wC
c#OZ=`
public static interface Sort { 5hB&]6n
public void sort(int[] data); "}\2zub9
} '<!/\Jz9l
022YuqL<v
public static void swap(int[] data, int i, int j) { _R1UEE3M
int temp = data; (gNI6;P;}
data = data[j]; k1L GT&
data[j] = temp; s+[_5n~
} x]euNa
} (iP,F]