[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; Yx%%+c?.
} a@a1/3
int i1=l; Z kS*CG
int i2=mid+1; Kq?7#,_
for(int cur=l;cur<=r;cur++){ 4J_%quxO
if(i1==mid+1) Rk=B;
data[cur]=temp[i2++]; q38; w~H
else if(i2>r) )6j:Mbz
data[cur]=temp[i1++]; +?<jSmGW
else if(temp[i1] data[cur]=temp[i1++]; g\.N>P@Bu
else _SaK]7}m!
data[cur]=temp[i2++]; a9I8WQ
} meL'toaJdQ
} "+WR[-n>\
/7#&qx8
} ?4Lo"igAA
1=X=jPwO C
改进后的归并排序: G](K2=
yR!>80$j
package org.rut.util.algorithm.support; NLpD,q{
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import org.rut.util.algorithm.SortUtil; e>^R 8qM?
P2p^jm
/** }:mI6zsNj
* @author treeroot _e3'f:
* @since 2006-2-2 $!f$R`R^Q\
* @version 1.0 h$&XQq0T
*/ }rE|\p>
public class ImprovedMergeSort implements SortUtil.Sort { GEA;9TU|V
M($},xAvDU
private static final int THRESHOLD = 10; > 95Cs`>d
(`NRF6'&1L
/* [jw o D
* (non-Javadoc) ;Ki1nq5c#s
* w}0Qy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q{hq.KZ
*/ Cg Sdyg@
public void sort(int[] data) { |-fx 0y
int[] temp=new int[data.length]; fh^_=R(/
mergeSort(data,temp,0,data.length-1); O2G+ '
} 5dF=DCZ
*LRGfk+h
private void mergeSort(int[] data, int[] temp, int l, int r) { ^sKXn:)
int i, j, k; MUrY>FYgx
int mid = (l + r) / 2; 2z\F m/Z.
if (l == r) b{rmxtx
return; RtL<hD
if ((mid - l) >= THRESHOLD) ^ztf:'l@C
mergeSort(data, temp, l, mid); CA4-&O"
else o^?{j*)g
insertSort(data, l, mid - l + 1); WI6E3,ejB1
if ((r - mid) > THRESHOLD) K*9b `%
mergeSort(data, temp, mid + 1, r); _&/Zab5
else Z@ kC28
insertSort(data, mid + 1, r - mid); mTfMuPPs[
uFm-HR@4
for (i = l; i <= mid; i++) { Bkc-iC}F
temp = data; XV>6;!=E
} 4m*(D5Y=|
for (j = 1; j <= r - mid; j++) { $<4Ar*i
temp[r - j + 1] = data[j + mid]; DBUwf1=qj
} IJ8DN@w9
int a = temp[l]; :RsPGj6
int b = temp[r]; cPcV[6)5K9
for (i = l, j = r, k = l; k <= r; k++) { C=IH#E=
if (a < b) { ?C:fP`j:
data[k] = temp[i++]; Z?.*.<"Sj
a = temp; v+#j>
} else { dYd~9
data[k] = temp[j--]; WDdi}i>2
b = temp[j]; 7]%il[
} X{}#hyYk"
} 4E>(Y98
} _,FoXf7
~8(X@~Tn*
/** +ca296^
* @param data -ZP&zOsDr
* @param l %g&,]=W\N
* @param i u;Eu<jU1
*/ x\.i`ukx
private void insertSort(int[] data, int start, int len) { >k}/$R+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y:%)cUxA
} aT#{t{gkA
} hPz df*(8
} {*;]I?9Al
} C..2y4bA}
OLNn3 J
堆排序： "t:.mA<v
@/~k8M/
package org.rut.util.algorithm.support; e6HlOGPVQH
tR*W-%
import org.rut.util.algorithm.SortUtil; _]UDmn[C
9*;isMkq<
/** ;jU-<
* @author treeroot $|(|Qzi%
* @since 2006-2-2 N&APqT
* @version 1.0 ]HV~xD7\
*/ eCIRt/ uA
public class HeapSort implements SortUtil.Sort{ npcBpGL{
D?}m h1#
/* (non-Javadoc) >J3ja>Gw/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =9 M|o0aY
*/ +?Jk@lE<
public void sort(int[] data) { gAA %x7
MaxHeap h=new MaxHeap(); ;"Y;l=9_
h.init(data); hlFU"u_
for(int i=0;i h.remove(); R}wwC[{
System.arraycopy(h.queue,1,data,0,data.length); d Zz^9:C+
} kgI=0W>
@P"`=BU&
private static class MaxHeap{ o+-Ge J
>|/? Up
void init(int[] data){ udD*E~1q
this.queue=new int[data.length+1]; 7G[ GHc>
for(int i=0;i queue[++size]=data; #)mkD4
fixUp(size); [gkRXP[DGs
} ru/zLj:
} h0GdFWN
/P!X4~sTM
private int size=0; wYQ1Z
K-5"#
private int[] queue; y-<PsP-I
B:- KZuO
public int get() { |369@un6
return queue[1]; O\?5#.
} IEoR7:
;}eEG{`Y
public void remove() { A,lw-(.z4Z
SortUtil.swap(queue,1,size--); ss`q{ARb
fixDown(1); k;fnC+Y$s
} YY:iPaGO
file://fixdown -{8Q= N
private void fixDown(int k) { im\YL<
int j; a&s"#j
while ((j = k << 1) <= size) { QE#-A@c
if (j < size %26amp;%26amp; queue[j] j++; ( X 'FQ
if (queue[k]>queue[j]) file://不用交换 x-V' 0-#U>
break; lv\F+?]a
SortUtil.swap(queue,j,k); +?j?|G
k = j; E8iadf49
} %<=vbL9
} 9(^X2L&Z
private void fixUp(int k) { _N,KHxsG8B
while (k > 1) { =o{: -EKQF
int j = k >> 1; 0(9I\j5`TT
if (queue[j]>queue[k]) ~e`;"n@4
break; {7TJgS
SortUtil.swap(queue,j,k); Jl}!CE@-
k = j; yToT7 X7F7
} Xw*%3'
} ;ad9{":J#B
4('0f:9z+
} GwMUIevO_
.}$`+h8WT
} +2V%'{:
\}u7T[R=`
SortUtil： Owh*KY:
Q_dXRBv=n
package org.rut.util.algorithm; 9!O+Ryy?\
KF:]4`$
import org.rut.util.algorithm.support.BubbleSort; lk*0c{_L
import org.rut.util.algorithm.support.HeapSort; iC\rhHKQ
import org.rut.util.algorithm.support.ImprovedMergeSort; kKxL04
import org.rut.util.algorithm.support.ImprovedQuickSort; %|`:5s-T%
import org.rut.util.algorithm.support.InsertSort; $dx1[V+_
import org.rut.util.algorithm.support.MergeSort; 6zp@#vYI
import org.rut.util.algorithm.support.QuickSort; 6"7:44O;G
import org.rut.util.algorithm.support.SelectionSort; c69U1
import org.rut.util.algorithm.support.ShellSort; s=q%:uCO
sxN>+v11z
/** c?p0#3%L#
* @author treeroot 1%SJ1oY
* @since 2006-2-2 [NCXn>Z
* @version 1.0 +eDN,iv
*/ s]F?=yEp
public class SortUtil { iJCY /*C}
public final static int INSERT = 1; f*|8n$%
public final static int BUBBLE = 2; ubzb
public final static int SELECTION = 3; I*+LJy;j
public final static int SHELL = 4; >%n8W>^^4
public final static int QUICK = 5; -~(0O
public final static int IMPROVED_QUICK = 6; 7E!";HT
public final static int MERGE = 7; [Q7->Wo|S:
public final static int IMPROVED_MERGE = 8; k lP{yxU'n
public final static int HEAP = 9; @o4z3Q@
|iwM9oO%
public static void sort(int[] data) { %S >xSqX
sort(data, IMPROVED_QUICK); _ bXVg3oDt
} ,yHzo
private static String[] name={ pjX%LsX\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u n?j
}; 1kvPiV=X>
dt-Qu},8-
private static Sort[] impl=new Sort[]{ 0^<Skm27"
new InsertSort(), ~!3t8Hx6
new BubbleSort(), [0%yJH
new SelectionSort(), NSMjr_
new ShellSort(), R (tiIo
new QuickSort(), :c~9>GCE&
new ImprovedQuickSort(), PSP1>-7)w
new MergeSort(), fB;&n
new ImprovedMergeSort(), wc6 E-rB
new HeapSort() q7O,I`KaJ
}; 36kc4=
QoW(tM
public static String toString(int algorithm){ 6o[0sM_];
return name[algorithm-1]; xE G+%Uk{
} |MOn0*
Xmf
public static void sort(int[] data, int algorithm) { $n=W2WJ6f
impl[algorithm-1].sort(data); <O,'5+zG%
} ++Rdv0~
M&|sR+$^
public static interface Sort { S4l)TtY
public void sort(int[] data); dJdD"xj
} G zJ9N`
{+@ms$z
public static void swap(int[] data, int i, int j) { QmWC2$b
int temp = data; /32Ta
data = data[j]; '|YtNhWZ?
data[j] = temp; oTq%wi6 _
} ILkjz^
} } D/+<