[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; W=9Zl(2C
} 6_s_2cr
int i1=l; HZHzjrx
int i2=mid+1; M^E\L C
for(int cur=l;cur<=r;cur++){ GT)63|
if(i1==mid+1) 7 q%|-`#
data[cur]=temp[i2++]; OZ/!=;
else if(i2>r) EM.7,;|N
data[cur]=temp[i1++]; X}/{90UD
else if(temp[i1] data[cur]=temp[i1++]; !)}3[h0
else >Mzk;TM
data[cur]=temp[i2++]; }c"1;C&{
} R6N+c\W
} Imi#$bF6
.[E"Kb}=
} &s|a\!>l
|"Rl_+d7D
改进后的归并排序: z`^DQ8+\j
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package org.rut.util.algorithm.support; FHu -';
c~1X/,biA
import org.rut.util.algorithm.SortUtil; nS53mLU)
c:R`]4o
/** Dj~]]
* @author treeroot n8!qz:z/
* @since 2006-2-2 QX'EMyK$
* @version 1.0 $p)7k
*/ huu v`$~y
public class ImprovedMergeSort implements SortUtil.Sort { ;m;a"j5
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private static final int THRESHOLD = 10; ]7d~,<3R
Kc>C$}/}$
/* x1$:u6YD22
* (non-Javadoc) mv,<#<-W
* "K"]/3`k-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JVoW*uA
*/ $E_9AaX
public void sort(int[] data) { F%8W*Y699
int[] temp=new int[data.length]; TH`zp]0
mergeSort(data,temp,0,data.length-1); %SwN/rna
} z g@,s"`>
<HLe,
private void mergeSort(int[] data, int[] temp, int l, int r) { v[aFSXGj)
int i, j, k; :DxCjv
int mid = (l + r) / 2; wQ7G_kVp
if (l == r) J< E"ZoY
return; oPX `/X#
if ((mid - l) >= THRESHOLD) ^st.bzg+[
mergeSort(data, temp, l, mid); jWg7RuN
else }SdI _sLe
insertSort(data, l, mid - l + 1); g"60{
if ((r - mid) > THRESHOLD) |HjoaN)
mergeSort(data, temp, mid + 1, r); `ehZ(H}
else -7^A_!.
insertSort(data, mid + 1, r - mid); :%!}%fkxH
wX0m8"g@
for (i = l; i <= mid; i++) { 5&y;r
temp = data; \,w*K'B_Y
} U%Kv}s/(F{
for (j = 1; j <= r - mid; j++) { 5kK:1hH7
temp[r - j + 1] = data[j + mid]; gbf-3KSp^
} MpV3.
int a = temp[l]; PP{CK4
int b = temp[r]; 62R94
for (i = l, j = r, k = l; k <= r; k++) { {M7`z,,[
if (a < b) { M*r/TT
data[k] = temp[i++]; m#D+Yh/y{n
a = temp; -`iXAyr)m
} else { Y7vTseq
data[k] = temp[j--]; Nn"[GB
b = temp[j]; ,~R`@5+
} BVKr 2v
} "5KJ /7q!
} g1je':
t8"*jt
/** COE,pb17
* @param data +s*OZ6i [
* @param l %TY;}V59b
* @param i fQ\nK H~
*/ !n=?H1@
private void insertSort(int[] data, int start, int len) { NhI&wl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D# $Fj
} BZ]6W/0
} !besMZ
} ;B35E!QJ
} YWV"I|Z
LqH<HGMFD
堆排序： c]#+W@$
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package org.rut.util.algorithm.support; Q^&oXM'x/i
5wy1%/;
import org.rut.util.algorithm.SortUtil; hPCt-
Bf72 .gx{0
/** wD|3Czc
* @author treeroot 6@7K\${
* @since 2006-2-2 O8;`6r
* @version 1.0 A`=;yD
*/ .4M8
public class HeapSort implements SortUtil.Sort{ )HrFWI'Y
m])!'Pa(=
/* (non-Javadoc) !)jw o=l}J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W+A-<Rh\
*/ tQSj[Yl
public void sort(int[] data) { oD$8(
MaxHeap h=new MaxHeap(); LQ,RQ~!
h.init(data); U4DQ+g(A
for(int i=0;i h.remove(); 0WasE1t|
System.arraycopy(h.queue,1,data,0,data.length); [-Zp[
} E+Jh4$x{
4G:I VK9
private static class MaxHeap{ ~?V+^<P
?_\t7f
void init(int[] data){ >^1|Mg/!>
this.queue=new int[data.length+1]; +`EF0sux
for(int i=0;i queue[++size]=data; T4}SF
fixUp(size); xW$F-n
} t/;@~jfr@
} \m.ap+dFa
GM.2bA(y
private int size=0; h8b*=oq
s6#@S4^=\
private int[] queue; ZS&n,<a5L}
-=W"
public int get() { hK!Z~
return queue[1]; ;j#$d@VG"
} f8ap+][
2?",2x09
public void remove() { oYYns%r}{
SortUtil.swap(queue,1,size--); _xg4;W6M=
fixDown(1); }pE8G#O&
} :ZP4(}
file://fixdown [x{S ,?6
private void fixDown(int k) { CaX0Jlk*
int j; u/Os
while ((j = k << 1) <= size) { ~c e?xr|
if (j < size %26amp;%26amp; queue[j] j++; [C GFzxz$
if (queue[k]>queue[j]) file://不用交换 .U8Se+;
break; ]dXHjOpA
SortUtil.swap(queue,j,k); rsbdDTy
k = j; pNOVyyo>BW
} -{Lc?=
} F1V[8I.0
private void fixUp(int k) { ?)B"\#`t
while (k > 1) { +]n.uA-`[a
int j = k >> 1; VZOf|o
if (queue[j]>queue[k]) R3MbTg
break; o8!gV/oy
SortUtil.swap(queue,j,k); !J34yro+s
k = j; N=qe*Rlf
} TBfX1v|Z)
} O"otzla
5zebH
} %5X}4k!p
!i0jk,[B=
} /Q7cQ2[EU
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SortUtil： ,/.U'{
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package org.rut.util.algorithm; GCxtWFXH
o<`)cb }
import org.rut.util.algorithm.support.BubbleSort; K^V*JH\G
import org.rut.util.algorithm.support.HeapSort; {HV$hU+_)Q
import org.rut.util.algorithm.support.ImprovedMergeSort; SZOcFmC?
import org.rut.util.algorithm.support.ImprovedQuickSort; P!?Je/Tz]
import org.rut.util.algorithm.support.InsertSort; RB5fn+FiZ
import org.rut.util.algorithm.support.MergeSort; hcQvL>
import org.rut.util.algorithm.support.QuickSort; ap;tggi(H
import org.rut.util.algorithm.support.SelectionSort; zVLv-U/=d
import org.rut.util.algorithm.support.ShellSort; ?[4!2T,Ca
Ua.7_Em
/** U @Il:\I
* @author treeroot ;4jRsirx9
* @since 2006-2-2 Mr}]P(4h
* @version 1.0 %21i#R`E
*/ =-M)2&~L~
public class SortUtil { 9N9dQ}[:g
public final static int INSERT = 1; 0phO1h]2S)
public final static int BUBBLE = 2; } z4=3'
public final static int SELECTION = 3; UOn L^Z}
public final static int SHELL = 4; -.A8kJ
public final static int QUICK = 5; c65_E<5Z
public final static int IMPROVED_QUICK = 6; S- Mh0o"
public final static int MERGE = 7; xO2S|DH{
public final static int IMPROVED_MERGE = 8; Mis t,H7
public final static int HEAP = 9; 2#4_/5(j*
a8T<f/qW k
public static void sort(int[] data) { (fgX!G[W
sort(data, IMPROVED_QUICK); O_*(:Z
} !B==cNq
private static String[] name={ Rn O%8Hk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !XjvvX"j
}; )k F/"'o
Z, Kbt
private static Sort[] impl=new Sort[]{ CPq{M.B
new InsertSort(), <!.'"*2
new BubbleSort(), -b>"2B?
new SelectionSort(), 8uyUvSB
new ShellSort(), I)~&6@Jn
new QuickSort(), z/*nY?
new ImprovedQuickSort(), Si<9Oh
new MergeSort(), ^7`"wj14
new ImprovedMergeSort(), 0_HdjK
new HeapSort() 2e}${NZN
}; -GkNA"2M[
~L!*p0dS^
public static String toString(int algorithm){ 7@g8nv(p
return name[algorithm-1]; R9SJ;TsE
} '3Ir(]Wfd
q#W|*kL3
public static void sort(int[] data, int algorithm) { <uP>
impl[algorithm-1].sort(data); 8y}9X v
} DXlP(={*
E3gR%t
public static interface Sort { e";r_J3w
public void sort(int[] data); U;n$
} [GeJn\C_?
T>(nc"(
public static void swap(int[] data, int i, int j) { `d#l o
int temp = data; F]~rA! g1
data = data[j]; x^aqnKoJ%\
data[j] = temp; ! /Z{uy
} =z'w-ARy
} DSY:aD!