[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; /!o(Y8e>x
} imx/hz!
int i1=l; u_aln[oIv
int i2=mid+1; fwy-M:
for(int cur=l;cur<=r;cur++){ 8ycmvpJ
if(i1==mid+1) )shzJ9G
data[cur]=temp[i2++]; Fr%LV#Q
else if(i2>r) &`a$n2ycy
data[cur]=temp[i1++]; 4>4*4!KR}
else if(temp[i1] data[cur]=temp[i1++]; v-85`h
else ILUA'T=B0
data[cur]=temp[i2++]; dqMR<Nl&
} q8:Z.<%8
} 9T47U; _)
4#5w^
} n9;+RhxA
W{OlJRX8
改进后的归并排序: {IeW~S'&
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package org.rut.util.algorithm.support; U*ZP>Vv
t)o #!)|
import org.rut.util.algorithm.SortUtil; (/&IBd-
JM{S49Lx
/** *G^n<p$"
* @author treeroot I/bED~Z:a
* @since 2006-2-2 s,TKC67.%+
* @version 1.0 5/Ng!bW
*/ PXGS5,
public class ImprovedMergeSort implements SortUtil.Sort { ;lST@>
V1KWi^
private static final int THRESHOLD = 10; "(}xIsy
%3e}YQe)
/* iTU8WWY<
* (non-Javadoc) ^4Ra$<
* 'sJ=h0d_[V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P>=~\v nN#
*/ SGW2'
public void sort(int[] data) { J/j1Yf'9
int[] temp=new int[data.length]; v]g/ 5qI&
mergeSort(data,temp,0,data.length-1); m",wjoZe*
} xm>RLx}9
rE"`q1b#
private void mergeSort(int[] data, int[] temp, int l, int r) { . m_y5J
int i, j, k; cA"',N8!5
int mid = (l + r) / 2; TX]4Y953D
if (l == r) 8WU UE=p
return; n.C.th >Y1
if ((mid - l) >= THRESHOLD) zIWw055W
mergeSort(data, temp, l, mid); 1)u 3
else lhTjG,U=
insertSort(data, l, mid - l + 1); 22|eiW/a
if ((r - mid) > THRESHOLD) ~.M{n&NM
mergeSort(data, temp, mid + 1, r); ~$>l@> xX
else nBL7LocvR
insertSort(data, mid + 1, r - mid); k,M%/AXd
o|8 5<~`
for (i = l; i <= mid; i++) { KzZ! CB\
temp = data; o)'T#uK
} xA]CtB*o7
for (j = 1; j <= r - mid; j++) { (7x5
temp[r - j + 1] = data[j + mid]; ^jb55X}
} oK@!yYv
int a = temp[l]; $78fR8|r-
int b = temp[r]; ys:1%D,,_
for (i = l, j = r, k = l; k <= r; k++) { 9@Yk8
if (a < b) { Mjq1qEi"B
data[k] = temp[i++]; QJp _>K
a = temp; Kxz<f>`b/
} else { 6 k+FTDL
data[k] = temp[j--]; CJk$o K{Q
b = temp[j]; O>xGH0H
} .&.j?kb
} E\#hcvP
} 4H8vB^
AD=@
/** /j./
* @param data {gluK#Qm
* @param l T5NO}bz
* @param i Z5;1ySn{
*/ r#*kx#"
private void insertSort(int[] data, int start, int len) { /ZZo`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,Cj1S7GFR
} %TdZ_
} MVz=:2)J2
} MhNzmI&`
} z`((l#(
,K .P,z~*
堆排序： V(1Ldl'a
DCM,|FE
package org.rut.util.algorithm.support; vL@N21u
Hv(0<k6oH
import org.rut.util.algorithm.SortUtil; [Rw0']i`4
:\L{S
/** 5j1}?0v_
* @author treeroot wxVf6`
* @since 2006-2-2 4.7OX&L'G
* @version 1.0 mf6?8!O}>
*/ Ji4c8*&Jpc
public class HeapSort implements SortUtil.Sort{ X|t?{.p
jFpXTy[>
/* (non-Javadoc) [c]X) @#S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZ3i#a4
*/ 1.!rq,+>1
public void sort(int[] data) { [>::@[
MaxHeap h=new MaxHeap(); `%p}.X
h.init(data); F.ryeOJ
for(int i=0;i h.remove(); k1i*1Tc
System.arraycopy(h.queue,1,data,0,data.length); Bx0^?>
} Kf2*|ZHj
E.Xfb"]
private static class MaxHeap{ bVSa}&*kM
E8J`7sa
void init(int[] data){ ViQxOUE
this.queue=new int[data.length+1]; qPuxYU
for(int i=0;i queue[++size]=data; ]Gm,sp.x
fixUp(size); YFOSv]w
} ,Y=r] fk
} ,.uu/qV}w
%YG ~ql
private int size=0; _$PZID
]S<eO6z
private int[] queue; wQWokpP;T7
4_3Jpz*
public int get() { v>YdPQky
return queue[1]; {\jh?P|
} -q|K\>tgU
} *|_P
public void remove() { BusD}9QqB
SortUtil.swap(queue,1,size--); =HmV0
fixDown(1); gN$.2+:
} >Jt,TMMlt
file://fixdown 6|wiZw
private void fixDown(int k) { /1ooOq]
int j; z8{kwz
while ((j = k << 1) <= size) { trnjOm
if (j < size %26amp;%26amp; queue[j] j++; 8<t6_* f
if (queue[k]>queue[j]) file://不用交换 Pe8WBr;`
break; z kQV$n{
SortUtil.swap(queue,j,k); R}c,ahd
k = j; $UavM|
} _O2},9L n
} =($RT
private void fixUp(int k) { @'j=oTT
while (k > 1) { ``j..v,
int j = k >> 1; D% }?l
if (queue[j]>queue[k]) s$css{(ek
break; ,@jRe&6
SortUtil.swap(queue,j,k); KlGPuGL
k = j; j9u/R01d
} _7#Ng@#\
} ]3wg-p+
sufidi
} _"SE^_&c
JO\Tf."a\
} n3t1'_/TU}
h 1G`z
SortUtil： $'*@g1vY
i<&*f}='
package org.rut.util.algorithm; 7YsBwo
>Lp^QP1gU
import org.rut.util.algorithm.support.BubbleSort; 2ikY.Xi6
import org.rut.util.algorithm.support.HeapSort; 0{#,'sc;
import org.rut.util.algorithm.support.ImprovedMergeSort; kmPK |R
import org.rut.util.algorithm.support.ImprovedQuickSort; $,4;_4t
import org.rut.util.algorithm.support.InsertSort; 8-5MGh0L
import org.rut.util.algorithm.support.MergeSort; e}yoy+9
import org.rut.util.algorithm.support.QuickSort; /KjRB_5~q}
import org.rut.util.algorithm.support.SelectionSort; JUXIE y^
import org.rut.util.algorithm.support.ShellSort; 5A/8G}'XZ
IXNcn@tN
/** l4?o0;:)
* @author treeroot 98eiYh
* @since 2006-2-2 4zs1BiMG
* @version 1.0 QEK,mc3
*/ t=syo->
public class SortUtil { ..6 : _{wg
public final static int INSERT = 1; 5_Yl!=
public final static int BUBBLE = 2; BTjfzfO"
public final static int SELECTION = 3; [` ~YPUR*
public final static int SHELL = 4; LWE[]1=
public final static int QUICK = 5; DqyJ]}|
public final static int IMPROVED_QUICK = 6; +6t<FH
public final static int MERGE = 7; :Y/i%#*1
public final static int IMPROVED_MERGE = 8; g\;AU2?p7
public final static int HEAP = 9; *5Upb,**
s2A3.SN
public static void sort(int[] data) { S'M=P_-7
sort(data, IMPROVED_QUICK); Ci6yH( RE
} >(5*y=\i
private static String[] name={ T)wc{C9w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d2lOx|jt
}; #R$d6N[H
Xr\|U89P
private static Sort[] impl=new Sort[]{ `3+yu' Q'
new InsertSort(), tn\Y:
new BubbleSort(), i0DYdUj
new SelectionSort(), p6m](Jg
new ShellSort(), 4]9+
new QuickSort(), TxAT ))
new ImprovedQuickSort(), WmU4~.
new MergeSort(), wuE]ju<
new ImprovedMergeSort(), h<H.8.o
new HeapSort() f1MKYM%^x
}; >B(%$jG Z
!GI*R2<W
public static String toString(int algorithm){ cmgI,n-o?
return name[algorithm-1]; ?:l3O_U5
} Awl4*J~
*KNj5>6=
public static void sort(int[] data, int algorithm) { o`S|
impl[algorithm-1].sort(data); UwOZBF<
} .,zrr&Po
=H6"\`W
public static interface Sort { xLX<.z!r
public void sort(int[] data); 58\rl G
} #(&!^X3
usEdp
public static void swap(int[] data, int i, int j) { gQaBQq9
int temp = data; 9EzXf+f
data = data[j]; vmdu9"H
data[j] = temp; J'^H@L/E
} "?EoYF_
} i? 5jl&30