[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; /=[hRn@)A
} {'UK>S
int i1=l; hkDew0k
int i2=mid+1; 1wLEkp!~
for(int cur=l;cur<=r;cur++){ FT Ytf4t
if(i1==mid+1) % pQi}x
data[cur]=temp[i2++]; 43s8a
else if(i2>r) )ZMR4U$+v
data[cur]=temp[i1++]; 9CFh'>}$
else if(temp[i1] data[cur]=temp[i1++]; ZkqZO#nq C
else Zv5vYe9Ow
data[cur]=temp[i2++]; XR+
} {lbNYjknS
} l&_PsnU
h1+y.4
} NRMEZ\*L
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改进后的归并排序: Ya29t98Pk
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package org.rut.util.algorithm.support; >c=-uI
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import org.rut.util.algorithm.SortUtil; )?<V-,D
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/** 9P&{Xhs7
* @author treeroot &l~9FE*
* @since 2006-2-2 EQVa8xt/C
* @version 1.0 7_~_$I~g*
*/ x-s\0l
public class ImprovedMergeSort implements SortUtil.Sort { 'Gqo{wl
4Cp)!Bq?/
private static final int THRESHOLD = 10; M&}_3
f/670Acv
/* "]}?{2i;
* (non-Javadoc) CE7{>pl
* #b@ sV$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [e7nW9\l
*/ 5"&=BD~D
public void sort(int[] data) { .\7AJB\l
int[] temp=new int[data.length]; ~BC~^D&WD
mergeSort(data,temp,0,data.length-1); $ qTv2)W1{
} ,*Z/3at}5M
qZ%0p*P#_
private void mergeSort(int[] data, int[] temp, int l, int r) { yJ*g ;
int i, j, k; m1DrT>oN'
int mid = (l + r) / 2; i?D)XXB85
if (l == r) |w.h97fj
return; l}~9xa}:D|
if ((mid - l) >= THRESHOLD) 42=/$V
mergeSort(data, temp, l, mid); SedVp cb+
else +R',$YzD
insertSort(data, l, mid - l + 1); v9 8s78
if ((r - mid) > THRESHOLD) F./P,hhN9
mergeSort(data, temp, mid + 1, r); "h:#'y$V
else XB<Q A>dLh
insertSort(data, mid + 1, r - mid); P=m l;xp
9)$gD
for (i = l; i <= mid; i++) { H`nd |
temp = data; vT#m 8Kg
} GI%9Tif
for (j = 1; j <= r - mid; j++) { 7X8n|NZRH7
temp[r - j + 1] = data[j + mid]; QB#_Wn
} +wcif-
int a = temp[l]; FKy2C:R(]
int b = temp[r]; Vo%DoZg
for (i = l, j = r, k = l; k <= r; k++) { bO+e?&vQ%
if (a < b) { LY2QKjgP
data[k] = temp[i++]; [6CWgQ%Ue
a = temp; TTJj=KPA
} else { 3Qd%`k
data[k] = temp[j--]; cd;~60@K
b = temp[j]; $9ys! <g
} H^JFPvEc
} KeWIC,kq
} Ee^>Q*wahw
zYEb#*Kar
/** <f;Xs(
* @param data |N0RBa4%
* @param l 0Vj!'=Ntv
* @param i p:xVi0
*/ w|:ev_c|
private void insertSort(int[] data, int start, int len) { #kp+e)F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o`.5NUn
} Go !{T
} `!C5"i8+i2
} (H-kWT
} BOme`0A
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堆排序： Hm]\.ZEy
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package org.rut.util.algorithm.support; 9`Xr7gmQf
DI=?{A
import org.rut.util.algorithm.SortUtil; %JuT'7VB
W];l[D<S*
/** YXIAVSnr
* @author treeroot -o+; e3#
* @since 2006-2-2 =QhK|C!$A
* @version 1.0 '~E=V:6
*/ c\VD8 :
public class HeapSort implements SortUtil.Sort{ tJpK/"R'
0W,.1J2*
/* (non-Javadoc) ddEV@2F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oG=4&SQ
*/ T&->xef=
public void sort(int[] data) { yK0iW
MaxHeap h=new MaxHeap(); i'z(`"
h.init(data); uHPd!#]
for(int i=0;i h.remove(); Hu"TEhW(2
System.arraycopy(h.queue,1,data,0,data.length); I[P_j`aE
} $ZRvvm!f
*mkL>v &
private static class MaxHeap{ gaR~K
y)b=7sU
void init(int[] data){ bdHHOpXM
this.queue=new int[data.length+1]; Q@/Z~xw"'I
for(int i=0;i queue[++size]=data; 8>[o.xV
fixUp(size); >njX=r.
} bf6:J `5Z
} ?L6pB]l8b
< mp_[-c
private int size=0; v8>bR|n5
S^nI=HTm
private int[] queue; >~})O&t
VJgYXPE `
public int get() { ?D=C8[NEX
return queue[1]; ]l6niYVB2
} s/Q8(sF5
n W:Bo#
public void remove() { d8&T62Dnd4
SortUtil.swap(queue,1,size--); j5G=ZI86y
fixDown(1); ZC3;QKw>
} KdC'#$
file://fixdown mJ+mTA5bW
private void fixDown(int k) { =}2k+v-B
int j; {11xjvAD
while ((j = k << 1) <= size) { /.Jq]"
if (j < size %26amp;%26amp; queue[j] j++; f}7/UGd
if (queue[k]>queue[j]) file://不用交换 nc;iJ/\4
break; TnJNs
SortUtil.swap(queue,j,k); C;']FmK]
k = j; VTK +aI
} /#!1
} 'EG/)0t`
private void fixUp(int k) { #1Iev7w
while (k > 1) { cN~F32<
int j = k >> 1; FLLfTkXdI
if (queue[j]>queue[k]) 0D&-BAzi
break; hSG1f`
SortUtil.swap(queue,j,k); +Os9}uKf
k = j; H.&"~eH
} 6)_h'v<|M
} NB3ar&.$S
a=M/0N{!
} !G;|~|fMV
]4]AcJj
} =L*-2cE6#
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SortUtil： n,`j~.l-=>
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package org.rut.util.algorithm; HEF\TH9
!%/(a)B$^$
import org.rut.util.algorithm.support.BubbleSort; mLDuizWI
import org.rut.util.algorithm.support.HeapSort; ozW\`
import org.rut.util.algorithm.support.ImprovedMergeSort; OXF/4Oe
import org.rut.util.algorithm.support.ImprovedQuickSort; =J'&.@Dwz
import org.rut.util.algorithm.support.InsertSort; Pp`[E/ qj4
import org.rut.util.algorithm.support.MergeSort; CB`GiH/j
import org.rut.util.algorithm.support.QuickSort; EOo,olklC
import org.rut.util.algorithm.support.SelectionSort; oT"7O5v
import org.rut.util.algorithm.support.ShellSort; co{i~['u
`IJTO_
/** 6yd?xeD
* @author treeroot 1Sd<cOEd
* @since 2006-2-2 >)VWXv0
* @version 1.0 v;d3uunqv
*/ 7AQv4
public class SortUtil { AU<A\
public final static int INSERT = 1; t!o=-k
public final static int BUBBLE = 2; {~ 1 ~V
public final static int SELECTION = 3; bZu2.?{
public final static int SHELL = 4; tkW7wP;
public final static int QUICK = 5; 9!s)52qt
public final static int IMPROVED_QUICK = 6; |l:,EA_v|
public final static int MERGE = 7; fHXz{,?/w
public final static int IMPROVED_MERGE = 8; U_~r0
public final static int HEAP = 9; 8}?w%FsN#
{VKP&{~O
public static void sort(int[] data) { "89L^I
sort(data, IMPROVED_QUICK); ESnir6HoU
} >w#&fd
private static String[] name={ %FLe@.Ep{D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S%o6cl=
}; scZ&}Ni
<%S[6*6U
private static Sort[] impl=new Sort[]{ o^Qy71Uj
new InsertSort(), '25zb+-
new BubbleSort(), QG5)mIJ
new SelectionSort(), BKQwF*<V
new ShellSort(), 8$38>cGY^
new QuickSort(), lVgin54Q
new ImprovedQuickSort(), UH#S |o4
new MergeSort(), n_4BNOZ~
new ImprovedMergeSort(), ww)ow\
new HeapSort() nKe|xP
}; D:PrFa
M>u84|`
public static String toString(int algorithm){ )TwA?kj
return name[algorithm-1]; yXBWu=w3`O
} RSIhZYA
yH]w(z5Z
public static void sort(int[] data, int algorithm) { 8r48+_y3u
impl[algorithm-1].sort(data); pf#~|n#t
} na3lbwq
Ie4Xk
public static interface Sort { bDnT><eH
public void sort(int[] data); Wo6C0Z3g}
} :+%Yul
XF?"G<2
public static void swap(int[] data, int i, int j) { Y.E]U!i*
int temp = data; 4q\gFFV4
data = data[j]; 3q.HZfN~
data[j] = temp; Y/qs\c+
} nBzju?X)I
} l|fb;Giq=D