[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; cn#JO^8
} 'bp*hqG[
int i1=l; B~oSKM%8R
int i2=mid+1; HVaWv].
for(int cur=l;cur<=r;cur++){ f)hs>F
if(i1==mid+1) flp<QT
data[cur]=temp[i2++]; D7cOEL<
else if(i2>r) z!27#gbL
data[cur]=temp[i1++]; aCzdYv\}&
else if(temp[i1] data[cur]=temp[i1++]; ""l_&3oz
else ]z`Y'wSxd
data[cur]=temp[i2++]; xMJF1O?3
} vf(8*}'!Q
} ;Vc@]6Ck
6J0HaL
} u38FY@U$
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改进后的归并排序: rhY>aj
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package org.rut.util.algorithm.support; K_j$iHqLF
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import org.rut.util.algorithm.SortUtil; yyZH1A
,!_
/** 2h0I1a,7
* @author treeroot s#om
* @since 2006-2-2 Kd^{~Wlz&z
* @version 1.0 ,\Gn
*/ K1#Y{k5D}
public class ImprovedMergeSort implements SortUtil.Sort { wJ-G7V,)
9],;i7c
private static final int THRESHOLD = 10; 3;=nQ{0b
@>f]0,"(
/* )\_xB_K\
* (non-Javadoc) yA_;\\
* 9i@AOU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I$0JAy
*/ i$[wgvJIV
public void sort(int[] data) { W Da;wt
int[] temp=new int[data.length]; I7b(fc-r
mergeSort(data,temp,0,data.length-1); ZxkX\gl91
} )}L*8 LV
dq~p]h~,H
private void mergeSort(int[] data, int[] temp, int l, int r) { AH`D&V
int i, j, k; D3Lu]=G
int mid = (l + r) / 2; d{+H|$L`
if (l == r) .CFaBwj
return; -'+|r]
if ((mid - l) >= THRESHOLD) eCdx(4(\a
mergeSort(data, temp, l, mid); mLX1w)=r
else fVv#|
insertSort(data, l, mid - l + 1); }CZ,WJz=
if ((r - mid) > THRESHOLD) UN_f2
mergeSort(data, temp, mid + 1, r); Gxfw!aF~
else TN3, \qgV
insertSort(data, mid + 1, r - mid); c.jq?Q k
8}h ^Frh
for (i = l; i <= mid; i++) { ?^P#P0
temp = data; nW+rJ
} :7%JD.;W
for (j = 1; j <= r - mid; j++) { 6"Q/Y[y
temp[r - j + 1] = data[j + mid]; , RfU1R
} &3v{~Xg)
int a = temp[l]; L^rtypkJ
int b = temp[r]; u.iFlU
for (i = l, j = r, k = l; k <= r; k++) { #EtS9D'd+
if (a < b) { Mp;t?C4
data[k] = temp[i++]; ],Wh]q
a = temp; 84tuN
} else { {n%-^9b1{&
data[k] = temp[j--]; "{;]T
b = temp[j]; AWCzu5ve
} ^T"9ZBkb
} uHBX}WH
} t+Mr1e
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/** =:`1!W0I
* @param data T_Q/KhLU
* @param l 3 2Q/4
* @param i [YP8z~
*/ A@*P4E`xp
private void insertSort(int[] data, int start, int len) { w_G/[R3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,$5;
} nS[0g^}
} b_ Sh#d&
} 0TU~Q
} udB:ys
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堆排序： *{tn/ro6a
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package org.rut.util.algorithm.support; ;&e5.K+.Z
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import org.rut.util.algorithm.SortUtil; O; EI&
94I8~Jj4
/** @]tFRV
* @author treeroot F0:Fv;
* @since 2006-2-2 '[JrP<~^o
* @version 1.0 "[@-p
*/ 7;KmJ}$
public class HeapSort implements SortUtil.Sort{ |Z6rP-
T :CsYj1
/* (non-Javadoc) $f>Mz|j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W-=~Afy
*/ ^te9f%>$l
public void sort(int[] data) { m}6GVQ'Q
MaxHeap h=new MaxHeap(); rS/Q
h.init(data); }aXc,;Ps
for(int i=0;i h.remove(); hd9fD[5
System.arraycopy(h.queue,1,data,0,data.length); AM##:4
} yXY8 oE
}r`!p5\$K0
private static class MaxHeap{ l#%Y]1*
MdU_zY(c
void init(int[] data){ tc@v9`^_
this.queue=new int[data.length+1]; ih2H~c>O
for(int i=0;i queue[++size]=data; B$g!4C `g
fixUp(size); ~b5aT;ObR
} O<S*bN>BF
} J5k\R+\H
>!E:$;i@
private int size=0; /7|u2!#Ui
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private int[] queue; 9cFFQM|o
|U1X~\""
public int get() { *kgbcUf8
return queue[1]; NWwfNb>
} 65N;PH59D
bjPI:j*XU
public void remove() { -,q&Zm
SortUtil.swap(queue,1,size--); e+bpbyV_#
fixDown(1); dTyTj|"x{
} (rt DT
file://fixdown Um;ReJ8z
private void fixDown(int k) { sq*R)cZ
int j; U/yYQZ\)
while ((j = k << 1) <= size) { 0KnlomuH2
if (j < size %26amp;%26amp; queue[j] j++; g6Qzkvw)
if (queue[k]>queue[j]) file://不用交换 :g'"*VXYB
break; z1f~:AdL
SortUtil.swap(queue,j,k); L|S#(0
k = j; Slq=;TDp
} //Ioh (N
} =NAL*4c+
private void fixUp(int k) { O-wR48Q
while (k > 1) { ?YXl.yj
int j = k >> 1; Sl^HMO
if (queue[j]>queue[k]) tNbCO+rZ
break; !#3#}R.$Fl
SortUtil.swap(queue,j,k); s ZkQJ->
k = j; Cv{rd##Y8
} g Gg8O? Z
} %&Z!-k(
!rb)Y;WQt
} U?>P6p
!-x^b.${B
} VyCBJK
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SortUtil： ; z:}OD
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package org.rut.util.algorithm; 9g"a`a?c
vBj{bnl
import org.rut.util.algorithm.support.BubbleSort; p(Y'fd}
import org.rut.util.algorithm.support.HeapSort; KLsTgo|J
import org.rut.util.algorithm.support.ImprovedMergeSort; 4&K~EX"^T
import org.rut.util.algorithm.support.ImprovedQuickSort; $&n!j'C:
import org.rut.util.algorithm.support.InsertSort; Mh>^~;
import org.rut.util.algorithm.support.MergeSort; r&0v,WSp&S
import org.rut.util.algorithm.support.QuickSort; azPFKg+
import org.rut.util.algorithm.support.SelectionSort; @]WN|K
import org.rut.util.algorithm.support.ShellSort; M<"&$qZ$R
D?qA aq&4
/** dy,,x
* @author treeroot T*J]e|aF
* @since 2006-2-2 0u QqPF t
* @version 1.0 Wxb/|?,
*/ hX$k8 o0
public class SortUtil { GpN tvo~
public final static int INSERT = 1; \4~uop,Nb+
public final static int BUBBLE = 2; ff?:_q+.N
public final static int SELECTION = 3; 65=i`!f
public final static int SHELL = 4; N#C,_ k
public final static int QUICK = 5; &Dqg<U
public final static int IMPROVED_QUICK = 6; 1`5d~>fV
public final static int MERGE = 7; qW][Q%'lt
public final static int IMPROVED_MERGE = 8; vNd4Fn)H
public final static int HEAP = 9; TTmNPp4q
`DC)U1
public static void sort(int[] data) { G~8C7$0z
sort(data, IMPROVED_QUICK); ~7 C` a$
} fph*|T&R
private static String[] name={ epW;]> l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !(w\%$|
}; 7tUl$H;I/R
q,^^c1f
private static Sort[] impl=new Sort[]{ )+N%!(ki
new InsertSort(), ^&h|HO-5
new BubbleSort(), a)Qx43mOS
new SelectionSort(), o9<jj>R;
new ShellSort(), r?\hZ*|M
new QuickSort(), @wYuc{%S
new ImprovedQuickSort(), P[8`]=
new MergeSort(), _Wk!d3bsx
new ImprovedMergeSort(), #`<|W5
new HeapSort() QlSZr[^v
}; 9W5vp:G
E{_p&FF
public static String toString(int algorithm){ G7M:LcX
return name[algorithm-1]; -1:yqF.x
} }Wn6r_:
?#rDoYt/Sx
public static void sort(int[] data, int algorithm) { $wdIOfaH
impl[algorithm-1].sort(data); :a0qm.EN
} hCc_+/j|
CcLP/
public static interface Sort { x>!#8?-h
public void sort(int[] data); Av_1cvR:
} o\g",O4-
fN?HF'7V
public static void swap(int[] data, int i, int j) { y_Bmd
int temp = data; g(,gg1mG
data = data[j]; ljlQ9wb[s
data[j] = temp; nr!kx)j
} G3OqRH
} 7 H.2]X