[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; BH3%dh:9
} 'fS&WVR?
int i1=l; )8@|+'q
int i2=mid+1; Z#znA4;)
for(int cur=l;cur<=r;cur++){ Zog&:]P'F
if(i1==mid+1) al@Hr*'
data[cur]=temp[i2++]; $Si|;j$?
else if(i2>r) rjWn>M
data[cur]=temp[i1++]; W"[Q=$2<<
else if(temp[i1] data[cur]=temp[i1++]; I;GbS`
else 8kYI ~
data[cur]=temp[i2++]; 9ymx;
} -.t/c}a#
} hj+iB,8
efXiZ
} `&w{-om\
b2Oj 1dP1
改进后的归并排序: 0qp Pz|h
&qMt07
package org.rut.util.algorithm.support; L{F[>^1Sb
GJj}|+|
import org.rut.util.algorithm.SortUtil; o8c5~fG1
}O+`X) 9
/** G:4'')T
* @author treeroot dBb &sA-A
* @since 2006-2-2 .g?Ppma
* @version 1.0 >hv8zHOO:
*/ p:?h)'bA<
public class ImprovedMergeSort implements SortUtil.Sort { {YMO8
}/J<#}t
private static final int THRESHOLD = 10; YS0^!7u
6^NL>|?
/* # ~(lY}
* (non-Javadoc) H84Zg/ ^
* PTP0 _|K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zJH:`~GxE
*/ 32z2c:G
public void sort(int[] data) { JsK_q9]$e
int[] temp=new int[data.length]; k, >*.Yoh
mergeSort(data,temp,0,data.length-1); Wf{&D>
} 4)Ab]CdD
2OZ<t@\OY
private void mergeSort(int[] data, int[] temp, int l, int r) { zXaA5rZO
int i, j, k; ,{Ga7rH*
int mid = (l + r) / 2; RXw }Tb/D8
if (l == r) L2> )HG
return; XDyFe'1I
if ((mid - l) >= THRESHOLD) K_GqM9
mergeSort(data, temp, l, mid); F~C7$
else $J9/AFzO"
insertSort(data, l, mid - l + 1); QP7N#mh
if ((r - mid) > THRESHOLD) [oG Sy5bB
mergeSort(data, temp, mid + 1, r); on.m '-s
else 3eN(Sw@p
insertSort(data, mid + 1, r - mid); auHP^O>4L
hh8U/dVk*
for (i = l; i <= mid; i++) { XM~eocn
temp = data; "Tnmn@
} %@^9(xTE
for (j = 1; j <= r - mid; j++) { 4vyJ<b
temp[r - j + 1] = data[j + mid]; ODCv^4}9
} [B@R(z=H
int a = temp[l]; |\T!,~
int b = temp[r]; @r]1;KG
for (i = l, j = r, k = l; k <= r; k++) { H,Yrk(O-
if (a < b) { CZ.HQc
data[k] = temp[i++]; :RDQP
a = temp; =VGRM#+D
} else { PMZ*ECIJU
data[k] = temp[j--]; bo[[<j!"I
b = temp[j]; `P jS
} JlE b
} ?P"j5
} '@f#GNRT
%o_CD>yD
/** &uXu$)IZ
* @param data tUhr gc
* @param l J5SOPG
* @param i 5@EX,$h
*/ #C+7~ns'
private void insertSort(int[] data, int start, int len) { b|u,[jEB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zTg&W7oz
} (d#W3
} V"5LNtf
} Hh'o:j(^
} # 66vkf*
-~_;9[uV
堆排序： @] 3`S
dF'oZQz
package org.rut.util.algorithm.support; !Q{~f;L
0pA>w8mh
import org.rut.util.algorithm.SortUtil; HiEQs|""'
lFD/hz7lc
/** VL2ACv(
* @author treeroot =' &TqiIv"
* @since 2006-2-2 EHda
* @version 1.0 S<>u
*/ VE*&t>I
public class HeapSort implements SortUtil.Sort{ ;_E][m
c:,K{ZR
/* (non-Javadoc) w C-x'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \&4)['4,
*/ M9/J!s
public void sort(int[] data) { DHh30b$c
MaxHeap h=new MaxHeap(); {oRR]>
h.init(data); Jqqt@5Ni
for(int i=0;i h.remove(); 0b+End#mp
System.arraycopy(h.queue,1,data,0,data.length); &W? hCr
} 2qPQ3-'
ICUI0/J
private static class MaxHeap{ L lVE5f?
..yLtqos
void init(int[] data){ vR'rYDtU@
this.queue=new int[data.length+1]; 3/*<i
for(int i=0;i queue[++size]=data; <%=@Ue
fixUp(size); Mf`@X[-;
} no8FSqLUS~
} g BV66L
nj7\vIR7
private int size=0; O],]\M{GL
Uc5BNk7<=
private int[] queue; Kr74|W=
?o_D#gG*
public int get() { ?#VkzT
return queue[1]; ;(;{~1~
} U\UlQp?
7hl,dtn7
public void remove() { XXC(R
SortUtil.swap(queue,1,size--); *!L it:H
fixDown(1); fC!+"g55
} CO"Nv
file://fixdown UYsyVY`Fm|
private void fixDown(int k) { q|kkdK|N/Y
int j; );*#s~R
while ((j = k << 1) <= size) { =l1O9/\9
if (j < size %26amp;%26amp; queue[j] j++; +{@hD+
if (queue[k]>queue[j]) file://不用交换 }yMAs
break; K)TMr"j\
SortUtil.swap(queue,j,k); [TX5O\g![
k = j; 2[Vs@X
} yn KgNi
} Gcd'-1
private void fixUp(int k) { [:bYd}J
while (k > 1) { j$}W%ibj
int j = k >> 1; k+y>xI,
if (queue[j]>queue[k]) SD=9fh0l
break; WcKL=Z?(
SortUtil.swap(queue,j,k); p^?]xD(
k = j; y<*/\]t9L[
} +<\.z*
} FAF+}
bs\7 juHt
} ,|Lf6k
^HI}bS1+|
} B&4NdL/
kc}&\y
SortUtil： h-=lZ~W~
i8>^{GODR
package org.rut.util.algorithm; z.]
w[?E oFI$Y
import org.rut.util.algorithm.support.BubbleSort; GJbU1k]
import org.rut.util.algorithm.support.HeapSort; U+'h~P'4
import org.rut.util.algorithm.support.ImprovedMergeSort; EmubpUS;
import org.rut.util.algorithm.support.ImprovedQuickSort; +N>&b%
import org.rut.util.algorithm.support.InsertSort; i9quP"<9
import org.rut.util.algorithm.support.MergeSort; A"R5Fd%6pc
import org.rut.util.algorithm.support.QuickSort; 9ZXEy }q57
import org.rut.util.algorithm.support.SelectionSort; V~_aM@q1
import org.rut.util.algorithm.support.ShellSort; ?s5hckhh
=#sr4T
/** :/941?%M
* @author treeroot UsBtk
* @since 2006-2-2 !(-S?*64l
* @version 1.0 MPF;P&6
*/ D}6~2j
public class SortUtil { n0<I
public final static int INSERT = 1; MNZD-[
public final static int BUBBLE = 2; 5p`.RWls
public final static int SELECTION = 3; ELqpIXq#
public final static int SHELL = 4; sQ>L3F;A`
public final static int QUICK = 5; 6;vfl*
public final static int IMPROVED_QUICK = 6; cR"?EQ] `N
public final static int MERGE = 7; .iXIoka
public final static int IMPROVED_MERGE = 8; Zm~oV?6
public final static int HEAP = 9; Rw#4 |&
yp.\KLq8)
public static void sort(int[] data) { #gd`X|<Ch
sort(data, IMPROVED_QUICK); y0f"UH/
} MW$ X4<*KD
private static String[] name={ <u%&@G$F>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "~^#{q
}; j`pX2S
tsvh/)V
private static Sort[] impl=new Sort[]{ R@Kzdeo
new InsertSort(), =w <;tb
new BubbleSort(), ae`6hW2
new SelectionSort(), +ZK12D}
new ShellSort(), )T26cT$
new QuickSort(), G>yTv`-
new ImprovedQuickSort(), XlGDv*d:#d
new MergeSort(), S eTn]
new ImprovedMergeSort(), N5\]VCX
new HeapSort() ~v+A6N:qC
}; !H[K"7w
vRn"0Mzl8
public static String toString(int algorithm){ c mI&R(
return name[algorithm-1]; #)hJ.0~3
} Tz{f5c&
V$';B=M
public static void sort(int[] data, int algorithm) { xpjv@P
impl[algorithm-1].sort(data); 1so9w89
} F.[E;gOTo
uiQRRT
public static interface Sort { y2:~_MD
public void sort(int[] data); >^5UXQr
} EmO{lCENk
suP/I?4'@
public static void swap(int[] data, int i, int j) { ]= nM|e
int temp = data; 9yt)9f
data = data[j]; _cw~N p
data[j] = temp; jj$D6f/mOG
} ub,GF?9
} ZN `D!e6