[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; NSq29#
} vJsg6oH
int i1=l; u<+"#.[2v~
int i2=mid+1; Tr;&bX5]H
for(int cur=l;cur<=r;cur++){ k?1e+ \
if(i1==mid+1) R38 \&F
data[cur]=temp[i2++]; +k0UVZZX?
else if(i2>r) kv2 H3O
data[cur]=temp[i1++]; (`R heEg@f
else if(temp[i1] data[cur]=temp[i1++]; [@]i_L[
else *?>52 -&b
data[cur]=temp[i2++]; lsgZ
} F;Q'R|HQ
} n;~'W*Ln0
@l&{ j
} &'?Hh(
y I[kaH"J
改进后的归并排序: AKS. XW
A7T(p7pP
package org.rut.util.algorithm.support; [+!+Yn6:
' t^ r2N/
import org.rut.util.algorithm.SortUtil; Qtt3;5m
,L-V?B(UQ
/** QT|\TplJt
* @author treeroot aY DM)b}
* @since 2006-2-2 PO|gM8E1x?
* @version 1.0 O:8Ne*L`D
*/ xS="o
public class ImprovedMergeSort implements SortUtil.Sort { xhB-gG=
gf^y3F[\
private static final int THRESHOLD = 10; PtGFLM9R
<S12=<c?'
/* 98vn"=3
* (non-Javadoc) BHU=TK@GR
* aPX'CG4m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cs[nFfM
*/ j9BcoEl:;
public void sort(int[] data) { j@4]0o
int[] temp=new int[data.length]; Sae*VvT6
mergeSort(data,temp,0,data.length-1); v9Lf|FXo&
} J?1Eh14KZ
X9C:AGbp
private void mergeSort(int[] data, int[] temp, int l, int r) { 1k{H,p7
int i, j, k; lk=[Xo
int mid = (l + r) / 2; b27t-p8
if (l == r) +6L.a3&(b
return; cb/$P!j7
if ((mid - l) >= THRESHOLD) 3@1$y`SN
mergeSort(data, temp, l, mid); aFL<(,~r
else 'L^M"f^I
insertSort(data, l, mid - l + 1); *g4Uo{
if ((r - mid) > THRESHOLD) gyU=v{].
mergeSort(data, temp, mid + 1, r); >A}ra^gU
else (R9"0WeF
insertSort(data, mid + 1, r - mid); 7_eV.'h
Qz$Wp*
for (i = l; i <= mid; i++) { z$VVt?K
temp = data; "kKIv|`
} Z5`V\$
for (j = 1; j <= r - mid; j++) { R?J8#JPXD
temp[r - j + 1] = data[j + mid]; C\0,D9
} E_{P^7Z|Jg
int a = temp[l]; BU|m{YZ$
int b = temp[r]; ~N)(|N
for (i = l, j = r, k = l; k <= r; k++) { ppeF,Q
if (a < b) { ^GiWU +`
data[k] = temp[i++]; ;x/.8fA
a = temp; &0{&4,
} else { dE3M
data[k] = temp[j--]; .fK~IKA
b = temp[j]; .mxc~
} y-Lm^GW4
} -1ci.4F&
} 6 I43a1[s
gUiZv8C
/** %mOQIXr1s
* @param data Xod/GYG
* @param l D"{%[;J
* @param i JYLAu4s6
*/ m,F4N$
private void insertSort(int[] data, int start, int len) { uTy00`1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -y/Y%]%0
} {H 3wL
} q{!ft9|K\d
} H<qz rO
} uY3?(f#
&-Q_%eM^
堆排序： LDDt=HEY4
E:P_CDSd]
package org.rut.util.algorithm.support; `*B6T7p1
k~JTQh*,w
import org.rut.util.algorithm.SortUtil; unr`.}A2>
2l~qzT-
/** LfvRH?<W
* @author treeroot WHRBYq_
* @since 2006-2-2 3RI%OCGF
* @version 1.0 c2PBYFCyC
*/ k?Njge6@
public class HeapSort implements SortUtil.Sort{ R-Y 7I
{k']nI.>
/* (non-Javadoc) j<h0`v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -R`nitf
*/ _V3}F1?W
public void sort(int[] data) { i~m;Ah,#
MaxHeap h=new MaxHeap(); S AKIFNE
h.init(data); 880T'5}S :
for(int i=0;i h.remove(); o\nFSGkn
System.arraycopy(h.queue,1,data,0,data.length); YIHGXi<"n
} Z|d+1i
^fbzlu?G4-
private static class MaxHeap{ +Ecn
&#'.I0n
void init(int[] data){ =r~ExW}+
this.queue=new int[data.length+1]; $8Gj9mw4e'
for(int i=0;i queue[++size]=data; :7s2M
fixUp(size); rW*[sLl3
} ,F=FM>o
} 9ol&p>
k jx<;##R8
private int size=0; AzSmfEaU0
/7WdG)'
private int[] queue; 1CS\1[E
Hr*xAx
public int get() { t24.u+O
return queue[1]; w[u>*I
} f/sLQdK,
+rka5ts
public void remove() { 4?c0rC<
SortUtil.swap(queue,1,size--); Bsj^R\
fixDown(1); )vGxF}I3
} Lv>OBHD
file://fixdown 4!-/m7%eF
private void fixDown(int k) { $kxu-
int j; RH;A|[7T&
while ((j = k << 1) <= size) { ?JR?PW8
if (j < size %26amp;%26amp; queue[j] j++; 9x#Tj/5%
if (queue[k]>queue[j]) file://不用交换 jT4 m(j
break; MKX58y{+
SortUtil.swap(queue,j,k); a._>?rVy
k = j; )eH?3""
} NOl/y@#
} q<cxmo0S
private void fixUp(int k) { X#ud_+6x
while (k > 1) { NZ%v{?
int j = k >> 1; ?2K~']\S
if (queue[j]>queue[k]) b.cBg.a
break; R=S)O.*R
SortUtil.swap(queue,j,k); Tz7|OV_W$
k = j; 5dL!e<<
} hcR^?
} 'T]Ok\
!z]{zM%
} N({-&A.N
/mK]O7O7
} Q'aVdJN,
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SortUtil： ;7(vqm<V2~
0hq\{pw_y*
package org.rut.util.algorithm; XLlJ|xhY-K
03!#99
import org.rut.util.algorithm.support.BubbleSort; -9R.mG
import org.rut.util.algorithm.support.HeapSort; SfPtG
import org.rut.util.algorithm.support.ImprovedMergeSort; L8KaK
import org.rut.util.algorithm.support.ImprovedQuickSort; -5@hU8B'a
import org.rut.util.algorithm.support.InsertSort; l=47#zbpZ]
import org.rut.util.algorithm.support.MergeSort; \\Nt^j3qR
import org.rut.util.algorithm.support.QuickSort; nE4rB\
import org.rut.util.algorithm.support.SelectionSort; ?&POVf>
import org.rut.util.algorithm.support.ShellSort; }S}%4c>
M%5_~g2n'\
/** )ZpMB
* @author treeroot k-sBf Jy\
* @since 2006-2-2 0,6!6>BOT
* @version 1.0 ' ?EG+o8
*/ <@;bxSUx
public class SortUtil { @`aPr26>?
public final static int INSERT = 1; vX$|/74
public final static int BUBBLE = 2; kWgrsN+Z
public final static int SELECTION = 3; }{.V^;
public final static int SHELL = 4; E>F6!qYm
public final static int QUICK = 5; %4w#EbkSS
public final static int IMPROVED_QUICK = 6; VA%4ssy
public final static int MERGE = 7; %/R[cj8
public final static int IMPROVED_MERGE = 8; E/_n}$Z
public final static int HEAP = 9; dDl_Pyg4K
~jJe|zg>
public static void sort(int[] data) { $Y%,?>AL<
sort(data, IMPROVED_QUICK); ;kD Rm'(
} _FN#Vq2
private static String[] name={ _w7yfZLv+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %/RT}CBBsW
}; ?*cCn-|
IC-W[~
private static Sort[] impl=new Sort[]{ +KIFLuL
new InsertSort(), P} Y .
new BubbleSort(), ty8E;['
new SelectionSort(), 2D"aAI<P
new ShellSort(), J n'SGR
new QuickSort(), COA>y?
new ImprovedQuickSort(), M?I^`6IOc8
new MergeSort(), nsu RG
new ImprovedMergeSort(), KqXPxp^_Al
new HeapSort() Q 2B
}; Om2w+yU
FMC]KXSd
public static String toString(int algorithm){ =@MJEo`D
return name[algorithm-1]; "nU] 2
} \Z-Fu=8J8^
iO}KERfU
public static void sort(int[] data, int algorithm) { Kae-Y
impl[algorithm-1].sort(data); ccy q~
} cPX^4d~9
[!`5kI
public static interface Sort { *Z3b6X'e
public void sort(int[] data); V/yj.aA*@
} E|_}?>{R
"1rT> ASWI
public static void swap(int[] data, int i, int j) { Am#Pa,g
int temp = data; <A&Zl&^1
data = data[j]; %.;;itB
data[j] = temp; ,Eo\(j2F.
} [x -<O:r=P
} |?ZNGPt