[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; T$U,rOB"
} 5}x^0 LY
int i1=l; 8{Bcl5]<
int i2=mid+1; %G1kkcdH<
for(int cur=l;cur<=r;cur++){ B<SuNbR
if(i1==mid+1) ^G.PdX$M
data[cur]=temp[i2++]; 2j9Mr
else if(i2>r) '2vZ%C$
data[cur]=temp[i1++]; ypM0}pdvTp
else if(temp[i1] data[cur]=temp[i1++]; x6d+`4
else {9q~bt
data[cur]=temp[i2++]; ykrb/j|rK
} %>_ZUu3M
} .S>:-j'u
1@JAY!yoo_
} Bd*:y qi
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改进后的归并排序: 9XImgeAs
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package org.rut.util.algorithm.support; nsQx\Tnhx
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import org.rut.util.algorithm.SortUtil; I,OEor6%R(
h[b;_>7
/** O~N0JK_>
* @author treeroot MKq:=^w
* @since 2006-2-2 7dhip
* @version 1.0 PJA%aRP,:
*/ qn}4PVn4
public class ImprovedMergeSort implements SortUtil.Sort { i1e|UR-wl
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private static final int THRESHOLD = 10; 78&jaw*1A
FO#`}? R`
/* .Xnw@\k'
* (non-Javadoc) Hy`Ee7>
* ^"WrE(3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p0U4#dD6
*/ ^vPM\qP#g
public void sort(int[] data) { 9(g?{6v|
int[] temp=new int[data.length]; I]t ",s/j
mergeSort(data,temp,0,data.length-1); uH7$/
} T2|dFKeWG
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private void mergeSort(int[] data, int[] temp, int l, int r) { V+j58Wuf
int i, j, k; s{\USD6
int mid = (l + r) / 2; lArYlR}
if (l == r) FGY4u4y
return; = s^KZV
if ((mid - l) >= THRESHOLD) =oz$uD}?
mergeSort(data, temp, l, mid); tfW*(oU
else $Tci_(V=F
insertSort(data, l, mid - l + 1); ?UCK
if ((r - mid) > THRESHOLD) ANh7`AUuO
mergeSort(data, temp, mid + 1, r); wPdp!h7B~N
else I/:M~ b
insertSort(data, mid + 1, r - mid); 0IO#h{t
OP>rEUtj
for (i = l; i <= mid; i++) { 4d~Sn81xW
temp = data; ^GMM%
} `IL''eJug_
for (j = 1; j <= r - mid; j++) { \@8j&],dl
temp[r - j + 1] = data[j + mid]; 8D7=]
} ',`GdfAsH
int a = temp[l]; Y~@@{zP
int b = temp[r]; d;1%Ei3K
for (i = l, j = r, k = l; k <= r; k++) { z2p@d1
if (a < b) { 7@iyO7U
data[k] = temp[i++]; `(NMHXgG+
a = temp; Kgh@.Ir
} else { zSt6q
data[k] = temp[j--]; M{M>$pt
b = temp[j]; =s3f{0G
} JtA tG%
} P?D;BAP2
} Hq=5/N
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/** N0TEVDsk
* @param data (0Buo#I
* @param l )1f8 H,q^
* @param i q{v?2v{
*/ h^QicvZ
private void insertSort(int[] data, int start, int len) { IjJO;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x xMV2&,Jq
} t*X k'(v
} Xi vzhI4
} 3zi(|B[,?
} 1C) l)pV
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堆排序： kaybi 0
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package org.rut.util.algorithm.support; lU6?p")F1
2 VgFP3
import org.rut.util.algorithm.SortUtil; UOh%"h
m^hi}Am1
/** hbfTv;=z
* @author treeroot +JQ/DNv
* @since 2006-2-2 24;F~y8H
* @version 1.0 x%<oeM3U
*/ ?&v+-4%4PI
public class HeapSort implements SortUtil.Sort{ 0V:7pSC{P
F/1B>2$`
/* (non-Javadoc) <*O~?=6p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QAs$fi}f]s
*/ wCT. (d_
public void sort(int[] data) { a W1y0
MaxHeap h=new MaxHeap(); L#)F00/`
h.init(data); :v-&}?
for(int i=0;i h.remove(); +"8AmN4
System.arraycopy(h.queue,1,data,0,data.length); ;Ohabbj*
} jpg$5jZ
sJA` A
private static class MaxHeap{ E"8cB]`|8
H<6TN^
void init(int[] data){ )<Cf,R
this.queue=new int[data.length+1]; xz9xt
for(int i=0;i queue[++size]=data; yMz%s=rh
fixUp(size); ! n@*6
} 0|mF /
} osB8 '\GR
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private int size=0; f]N.$,:$
T_T@0`7
private int[] queue; 7Q_AZR4
2|2'?
public int get() { kY e3A&J
return queue[1]; (- ]A1WQ?
} iIZDtZFF
bo>4:i
public void remove() { `|9NxF+
SortUtil.swap(queue,1,size--); ji'NR
fixDown(1); fC1PPgQ\
} Z1@E
file://fixdown 0M[O(.x
private void fixDown(int k) { 70sb{)
int j; TV^m1uC
while ((j = k << 1) <= size) { h%2;B;p]
if (j < size %26amp;%26amp; queue[j] j++; A}./ ;[
if (queue[k]>queue[j]) file://不用交换 \J@i:J6x$1
break; AC`4n|,zJ;
SortUtil.swap(queue,j,k); Atdr|2
k = j; $?voQ&
} ="yN4+0-p
} m*'^*#
private void fixUp(int k) { "YW&,X5R
while (k > 1) { A:{PPjs%LA
int j = k >> 1; 6 GL.bS
if (queue[j]>queue[k]) (f Gmjx
break; H);O.m
SortUtil.swap(queue,j,k); EMe3Xb `
k = j; .\/jy]Y
} OC(S"&D
} 2;!,:bFb
k`#OXLR
} k)'y;{IN
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} 960[.99
ar+ j`QIe
SortUtil： 8xAxn+;
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package org.rut.util.algorithm; -> $]`h"
}(*eRF'
import org.rut.util.algorithm.support.BubbleSort; gd#j{yI/Xf
import org.rut.util.algorithm.support.HeapSort; dp&8:jy
import org.rut.util.algorithm.support.ImprovedMergeSort; "'#18&N
import org.rut.util.algorithm.support.ImprovedQuickSort; osBwX.G'l
import org.rut.util.algorithm.support.InsertSort; \w;d4r8x
import org.rut.util.algorithm.support.MergeSort; y;'yob
import org.rut.util.algorithm.support.QuickSort; i.O670D
import org.rut.util.algorithm.support.SelectionSort; A>C&`A=-
import org.rut.util.algorithm.support.ShellSort; U04TVQn`
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/** U-b(
* @author treeroot PTt#Ixn,
* @since 2006-2-2 @e`%'
* @version 1.0 REEs}88);'
*/ blUnAu o~
public class SortUtil { ^(w%m#
public final static int INSERT = 1; V*}xlxSL
public final static int BUBBLE = 2; &oU) ,H
public final static int SELECTION = 3; RB,`I#z1f
public final static int SHELL = 4; %3Ba9Nmid
public final static int QUICK = 5; [9hslk
public final static int IMPROVED_QUICK = 6; g?TPRr~$9
public final static int MERGE = 7; -k4w$0)
public final static int IMPROVED_MERGE = 8; R]LRgfi9
public final static int HEAP = 9; 5ov F$qn
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public static void sort(int[] data) { &3@{?K
sort(data, IMPROVED_QUICK); -[h2fqu1
} YI877T9>
private static String[] name={ <l#|I'hP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lo<-;;vQ
}; X-lB1uq^
@Rc/^B:
private static Sort[] impl=new Sort[]{ LBcnBo</v
new InsertSort(), j3W)
new BubbleSort(), \sSt _|+
new SelectionSort(), -@I+IKz
new ShellSort(), 2aDjt{7P
new QuickSort(), `FJ2 ?
new ImprovedQuickSort(), 7I#<w[l>k
new MergeSort(), aa-{,X"MF
new ImprovedMergeSort(), MAv-`8@|
new HeapSort() e$vvmbK.
}; 4~s{zob
:kQ%Mj>
public static String toString(int algorithm){ [|5gw3y
return name[algorithm-1]; >'/KOK"
} o(gEyK
\#yKCA';
public static void sort(int[] data, int algorithm) { =x &"aF1
impl[algorithm-1].sort(data); {E 'go]
} hOOkf mOM
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public static interface Sort { cZb5h 9
public void sort(int[] data); uV|%idC
} @P'("qb~
-;1nv:7Z3
public static void swap(int[] data, int i, int j) { l KdY!j"
int temp = data; yPn!1=-(
data = data[j]; 6T`F'Fk[
data[j] = temp; ?z[k.l+6w
} s7789pR
} *XCgl*% *