[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; x,\!DLq:p
} !R6ApB4ZI
int i1=l; M&f#wQ
int i2=mid+1; qp&4 1
for(int cur=l;cur<=r;cur++){ jgq{pZ#E
if(i1==mid+1) ~RInN+N#
data[cur]=temp[i2++]; 5)`h0TK
else if(i2>r) _B[WY
data[cur]=temp[i1++]; . :a<2sp6
else if(temp[i1] data[cur]=temp[i1++]; n=o_1M|
else a+Ab]m8`
data[cur]=temp[i2++]; 2+:'0Krc
} C ) ?uE'
} @5E,:)T*wR
'$[Di'*;
} 8W -@N
X;VQEDMPU
改进后的归并排序: M{E{NK
vq>l>as9O
package org.rut.util.algorithm.support; "Pj}E=!k
m$:&P|!'p
import org.rut.util.algorithm.SortUtil; bX2"89{
!re1EL
/** 55m<XC
* @author treeroot {G*OR,HN
* @since 2006-2-2 bfdVED
* @version 1.0 Qn|+eLY
*/ MhxDV d
public class ImprovedMergeSort implements SortUtil.Sort { e&1\'Zq?>
K9|7dvzC:
private static final int THRESHOLD = 10; w4%AJmt
re`t ]gzb
/* *7RvHHf
* (non-Javadoc) >emcJVYV`[
* ;LMWNy4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }l;Lxb2`
*/ jO8k6<l
public void sort(int[] data) { x_!ZycEa
int[] temp=new int[data.length]; kg>>D
mergeSort(data,temp,0,data.length-1); ^E,1V5
} CDdkoajBa
d8OL!Rk
private void mergeSort(int[] data, int[] temp, int l, int r) { ZnfNQl[
int i, j, k; gQouOjfP
int mid = (l + r) / 2; L`[z[p{?
if (l == r) qZ X/@Yxz
return; Tlodn7%",
if ((mid - l) >= THRESHOLD) yPgmg@G@/
mergeSort(data, temp, l, mid); VKW|kU7Cs$
else _Qd,VE 8u
insertSort(data, l, mid - l + 1); ao$.6X8fQ
if ((r - mid) > THRESHOLD) L1#Ij#
mergeSort(data, temp, mid + 1, r); H{(]9{
else SEd5)0X^
insertSort(data, mid + 1, r - mid); yL1CZ_
I%lE;'x
for (i = l; i <= mid; i++) { g/Wh,f3
temp = data; 0KvVw rWJ
} k6**u
for (j = 1; j <= r - mid; j++) { IL!=mZ>2O
temp[r - j + 1] = data[j + mid]; %XTA;lrz
} HeA{3s
int a = temp[l]; :c]`D>
int b = temp[r]; H0*,8i5I
for (i = l, j = r, k = l; k <= r; k++) { B'weok
if (a < b) { <J{'o`{
data[k] = temp[i++]; MI#mAg<
a = temp; Vpp&|n9^
} else { ~;#MpG;e
data[k] = temp[j--]; l]_=:)" ]
b = temp[j]; %NARyz
} [aqu}Su
} x?yD=Mq_
} K_BPZ5w
n$)_9:Z-j
/** 1np^(['ih
* @param data ;LwqTlJ*[L
* @param l xUWr}j4;
* @param i , c;eN
*/ NgZUnh3{
private void insertSort(int[] data, int start, int len) { rOfK~g,X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); slW3qRT\k
} 8E^@yZo{
} KeBQH8A1N
} )Y]/^1hx
} r/:%}(7;
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堆排序： ,?-\ x6
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package org.rut.util.algorithm.support; >_ \<E!j
-X1X)0v$
import org.rut.util.algorithm.SortUtil; %{5n1w
-_^c6!i
/** 3I=kr
* @author treeroot -uR72f
* @since 2006-2-2 "^CXY3v
* @version 1.0 )Hw:E71h2
*/ {rH9grb
public class HeapSort implements SortUtil.Sort{ HZ"Evl|n
h{iEZ#
/* (non-Javadoc) $1Nd_pD=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tupiq
*/ LXfCmc9|Z
public void sort(int[] data) { ;3ft1
MaxHeap h=new MaxHeap(); }At{'8*n
h.init(data); 9s$U%F6}
for(int i=0;i h.remove(); ~Pf5ORoe
System.arraycopy(h.queue,1,data,0,data.length); 9@VO+E$7L
} P9Q2gVGAO{
(!K_Fy@
private static class MaxHeap{ $17 su')
#Z!b G?="
void init(int[] data){ $p* p
this.queue=new int[data.length+1]; oR#:NtX@
for(int i=0;i queue[++size]=data; l}g;'9ZB
fixUp(size); %}Q&1P=
} Ukphd$3J=
} @9G- m(?*
v:_B kHN'
private int size=0; JiS5um=(.
Es5p}uh.[Y
private int[] queue; !dcwq;Ea
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public int get() { %:C ]7gQ
return queue[1]; akuJz
} g[z.*y/
gPC@Yy
public void remove() { >`T5]_a
SortUtil.swap(queue,1,size--); \l#>dq"Y
fixDown(1); 8nNsrat
} .w? .ib(
file://fixdown jFG0`n}I
private void fixDown(int k) { ,d,\-x-+/
int j; rnm03 '{
while ((j = k << 1) <= size) { |Rzy8j*
if (j < size %26amp;%26amp; queue[j] j++; hq>Csj==@
if (queue[k]>queue[j]) file://不用交换 &~DTZgY
break; -`c:}m
SortUtil.swap(queue,j,k); )hKS0`$|
k = j; d.<~&.-$
} <I*x0BM=
} XR+3j/zEQ
private void fixUp(int k) { WgR4Ix^L#
while (k > 1) { -#&kYK#Ph
int j = k >> 1; ,Fqz e/
if (queue[j]>queue[k]) 5ua?I9fY
break; D@YP7
SortUtil.swap(queue,j,k); r8MZvm2
k = j; "E!mva*NU
} D$k8^Vs
} Bo_ym36N
}k$4/7ri
} $\Lyi#<
w2gf&Lc\
} ik1tidw
rx~[Zs+*
SortUtil： AD5) .}[F
0&Gl@4oZ"
package org.rut.util.algorithm; Eh8Pwt7C@
%uESrc-;
import org.rut.util.algorithm.support.BubbleSort; >O9sk
import org.rut.util.algorithm.support.HeapSort; jB$SUO`*
import org.rut.util.algorithm.support.ImprovedMergeSort; 8pZ<9t'
import org.rut.util.algorithm.support.ImprovedQuickSort; {kB `>VS
import org.rut.util.algorithm.support.InsertSort; [.yJV`
import org.rut.util.algorithm.support.MergeSort; #} ,x @]p
import org.rut.util.algorithm.support.QuickSort; cL7g}$W$
import org.rut.util.algorithm.support.SelectionSort; haSM=;uPM
import org.rut.util.algorithm.support.ShellSort; 0OZMlt%z
b}z`BRCc
/** F}?<v8#z0
* @author treeroot ,32xcj}j)r
* @since 2006-2-2 T3J'fjY
* @version 1.0 dz9Y}\2tf
*/ $Rtgr{ {;"
public class SortUtil { z5cYyx r>
public final static int INSERT = 1; >=,uau7
public final static int BUBBLE = 2; >wON\N0V_
public final static int SELECTION = 3; cSD{$B:
public final static int SHELL = 4; _]>JB0IY
public final static int QUICK = 5; {ShgJ;! Q
public final static int IMPROVED_QUICK = 6; F3E[wdT
public final static int MERGE = 7; x-m/SI]_N
public final static int IMPROVED_MERGE = 8; d.F)9h]XHO
public final static int HEAP = 9; 7qIB7_K5
HxwlYx,4
public static void sort(int[] data) { V^fV7hw<
sort(data, IMPROVED_QUICK); fib#CY
} v|t{1[C
private static String[] name={ P_4DGW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HMQI&Lh=U
}; J1F{v)T'?
je%M AgW`
private static Sort[] impl=new Sort[]{ L10IF
new InsertSort(), RVM&4#E
new BubbleSort(), /p`&;/V|
new SelectionSort(), D_D,t8_Y
new ShellSort(), L:f)i,S"5q
new QuickSort(), RIy\u>
new ImprovedQuickSort(), @'jfKW
new MergeSort(), f=:.BR{
new ImprovedMergeSort(), [1Dm<G u@
new HeapSort() ;Rnhe_A.
}; Jbw!:x [
=:7$/T'Qg
public static String toString(int algorithm){ 05e>\}{0
return name[algorithm-1]; pdz'!I
} K&`Awv
Z6s5M{mE
public static void sort(int[] data, int algorithm) { %$X\"
impl[algorithm-1].sort(data); .]t5q%}j
} O.\h'3C
TipHV;|e
public static interface Sort { !D:k!
public void sort(int[] data); gY5l.&
} Jq1 n0O
9D_wG\g
public static void swap(int[] data, int i, int j) { L(o#4YH}>J
int temp = data; {8CWWfHCD
data = data[j]; Wc4vCVw
data[j] = temp; ~ =.CTm]vf
} 7'j9rmTXs
} IC~ljy]y_