[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; ?^ezEpW
} v9lBk]c
int i1=l; D*'M^k|1
int i2=mid+1; N('DIi*or
for(int cur=l;cur<=r;cur++){ e.|RC
if(i1==mid+1) yVQz<tX|
data[cur]=temp[i2++]; Sx9:$"3.X
else if(i2>r) ^@L l(?
data[cur]=temp[i1++]; Ja=70ZI^6
else if(temp[i1] data[cur]=temp[i1++]; kah3Uhr~
else ANQa2swM
data[cur]=temp[i2++]; Bye@5D
} tO>OD#
} 1idjX"'
?J@qg20z
} " IkF/
bSR+yr'?
改进后的归并排序: ]q[
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package org.rut.util.algorithm.support; V/9"Xmv75
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import org.rut.util.algorithm.SortUtil; w[7.@%^[
|;u%JW$4
/** Q=L$7
* @author treeroot ElR&scXi__
* @since 2006-2-2 uj9tr`Zh
* @version 1.0 n vpPmc
*/ u4,X.3V]A
public class ImprovedMergeSort implements SortUtil.Sort { wQ=yY$VP
pY!dG-;
private static final int THRESHOLD = 10; gLSG:7m@
LH/&\k
/* ?WQd
* (non-Javadoc) -8Jl4F ,
* .1}rzh}8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fJ&<iD)6
*/ k CW!m
public void sort(int[] data) { 7hF,gl5
int[] temp=new int[data.length]; Uq]EJu
mergeSort(data,temp,0,data.length-1); @6YBK+"
} a j@C0
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private void mergeSort(int[] data, int[] temp, int l, int r) { L>~@9a\jO
int i, j, k; UC+7-y,
int mid = (l + r) / 2; C*EhexK,}
if (l == r) ua$k^m7m5
return; A|taP$%
if ((mid - l) >= THRESHOLD) >1a\%G
mergeSort(data, temp, l, mid); )`s;~_ZZ
else [}p
insertSort(data, l, mid - l + 1); x?f0Hk+
if ((r - mid) > THRESHOLD) UR/qVO?
mergeSort(data, temp, mid + 1, r); >FY&-4+v
else o,CA;_
insertSort(data, mid + 1, r - mid); dI_r:xN
{8{t]LK<
for (i = l; i <= mid; i++) { }c35FM,
temp = data; J)$&z*!
} +24|_Lx0
for (j = 1; j <= r - mid; j++) { S_|9j{w)
temp[r - j + 1] = data[j + mid]; d DIQ+/mmg
} Y/^[qD
int a = temp[l]; !c4)pMd
int b = temp[r]; C7b 5%a!
for (i = l, j = r, k = l; k <= r; k++) { -- i&"
if (a < b) { b(|%Gbg@c
data[k] = temp[i++]; cyGN3t9`.
a = temp; Evr2|4|O~
} else { UzU-eyA
data[k] = temp[j--]; <ELziE~>V
b = temp[j]; `z3|M#r\;
} ZRXI?Jr%
} ){O1&|z-
} wGOMUWAt
/'Quu)~
/** q)K-vt)98
* @param data IwTr'}XIw
* @param l qa 6=W
* @param i o{{:|%m3Q
*/ 'GV&]
private void insertSort(int[] data, int start, int len) { !y>lOw})Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4NpHX+=P
} %rM-"6Q
} u;+%Qh
} (MgL"8TS
} H o4B
0M#N=%31
堆排序： @DfkGm[%
I;Al?&uw
package org.rut.util.algorithm.support; xNC* ]8d
gq H`GI
import org.rut.util.algorithm.SortUtil; P<>[e9|
a);O3N/*I
/** `j"4:
* @author treeroot Qy{NS.T
* @since 2006-2-2 -;+m%"k5
* @version 1.0 KH>Sc3p
*/ -/M9 vS
public class HeapSort implements SortUtil.Sort{ .HyjL5r-
vx04h~
/* (non-Javadoc) "%:7j!#X|I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m5e\rMN~>\
*/ i'M^ez)u
public void sort(int[] data) { nHI(V-E2:H
MaxHeap h=new MaxHeap(); `[X6#`<
h.init(data); f|X[gL,B
for(int i=0;i h.remove(); P7}t lHX
System.arraycopy(h.queue,1,data,0,data.length); lP}o[Rd
} :0nK`$'
_TZW|Dh-2F
private static class MaxHeap{ ,"@w>WL<9
Vn)%C_-]A
void init(int[] data){ i%xI9BO9
this.queue=new int[data.length+1]; MPjr_yc]
for(int i=0;i queue[++size]=data; hA@zoIoe
fixUp(size); nped
} lN);~|IOv7
} PASuf.U$"
H!Wis3S3G
private int size=0; nA>*IU[
j'k8^*M6
private int[] queue; L5R `w&Up
f8^"E $"
public int get() { (})]H:W7
return queue[1]; {GUb'J
} &K06}[J
+*n]tlk
public void remove() { USE [N
SortUtil.swap(queue,1,size--); ah 4kA LO
fixDown(1); *]FgfttES
} 'n>K^rA
file://fixdown $X`bm*
private void fixDown(int k) { Pg7>ce
int j; e%pu.q\gK
while ((j = k << 1) <= size) { %'$f ?y
if (j < size %26amp;%26amp; queue[j] j++; IZ+*`E
if (queue[k]>queue[j]) file://不用交换 MO[c0n%
break; /^d. &@*
SortUtil.swap(queue,j,k); AeN 3<|RN
k = j; W5pn;u- sz
} Dp^"J85}
} E yd$fcRK
private void fixUp(int k) { @o`sf-8x
while (k > 1) { +IvNyj|
int j = k >> 1; VxNXd?
if (queue[j]>queue[k]) uH$oGY
break; ]GcV0&|
SortUtil.swap(queue,j,k); YFG-U-t3
k = j; T]^?l
} KCE=|*6::|
} 5n:nZ_D
!zU/Hq{wcK
} xf'LR[M
miwf&b
} 9p5= _
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SortUtil： M/*Bh,M`
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package org.rut.util.algorithm; iM8sX B
Hyf"iYv+
import org.rut.util.algorithm.support.BubbleSort; 3be6p
import org.rut.util.algorithm.support.HeapSort; RZ*<n$#6
import org.rut.util.algorithm.support.ImprovedMergeSort; #?_#!T|
import org.rut.util.algorithm.support.ImprovedQuickSort; nQ|GqU\oA
import org.rut.util.algorithm.support.InsertSort; V)=Z6ti
import org.rut.util.algorithm.support.MergeSort; )W#T2Z>N1
import org.rut.util.algorithm.support.QuickSort; 18jJzYawh
import org.rut.util.algorithm.support.SelectionSort; S,XKW(5
import org.rut.util.algorithm.support.ShellSort; z23#G>I&
jg?bf/$s
/** %W(^6p!
* @author treeroot nkTYWw
* @since 2006-2-2 )u<eO FI+
* @version 1.0 / HL_$g<
*/ nMkOUW:T!
public class SortUtil { {yTpRQN~
public final static int INSERT = 1; ]{<saAmJC
public final static int BUBBLE = 2; TopHE
public final static int SELECTION = 3; ^1R"7h
public final static int SHELL = 4; Vu=] O/ =P
public final static int QUICK = 5; aFyh,
public final static int IMPROVED_QUICK = 6; ,}KwP*:Z
public final static int MERGE = 7; |hc\jb
public final static int IMPROVED_MERGE = 8; l(#1mY5!q8
public final static int HEAP = 9; grc:Y
>}CEN
public static void sort(int[] data) { @`6}`k
sort(data, IMPROVED_QUICK); GKCM|Y
} "3wv:BL
private static String[] name={ hzq5![/sV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >:A<"wZ
}; oooS s&t
vG2.]?
private static Sort[] impl=new Sort[]{ Nfg{,/O
new InsertSort(), .8K6C]gw
new BubbleSort(), =x1Wii$`
new SelectionSort(), #,TELzUVE
new ShellSort(), -;vT<G3
new QuickSort(), )y`i@S}J
new ImprovedQuickSort(), Yc|uD-y
new MergeSort(), 7_KXD#
new ImprovedMergeSort(), *U_S1>0n
new HeapSort() (#If1[L
}; UoHd-
oXdel Ju?
public static String toString(int algorithm){ =MxpH+spI
return name[algorithm-1]; j|mv+O
} !3@{U@*Z]
v$;@0t:;#
public static void sort(int[] data, int algorithm) { Je 31".
impl[algorithm-1].sort(data); Od-Ax+Hp
} WtVf wC_
/9Z!p
public static interface Sort { M1EOnq4-
public void sort(int[] data); #~S>K3(
} Q,~x#
>nK%^T
public static void swap(int[] data, int i, int j) { F_v-}bbcFQ
int temp = data; T{tn.sT
data = data[j]; 7*/J4MN
data[j] = temp; |g!`\@O
} s%O Y<B@V2
} kutJd{68