[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; ;1O_M9
} tKx~1-
int i1=l; jrr*!^4|
int i2=mid+1; Mhf5bN|wQ
for(int cur=l;cur<=r;cur++){ &n}f?
if(i1==mid+1) qCpp6~]Um
data[cur]=temp[i2++]; }1i`6`y1
else if(i2>r) VfC<WVYiZ
data[cur]=temp[i1++]; &zeyE;/Hj
else if(temp[i1] data[cur]=temp[i1++]; O6a<`]F
else _w+:Dv~*a
data[cur]=temp[i2++]; ?u=Fj_N_
} j8{i#;s!"
} qqr?!vem6
f:|1_j
} 6J6BF%
J76kkW`5
改进后的归并排序: QIvVcfM^
4n g]\ituS
package org.rut.util.algorithm.support; JZ*/,|1}EC
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import org.rut.util.algorithm.SortUtil; 6x[}g
A_ N;
/** FvXZ<(A{
* @author treeroot \[_t]'p
* @since 2006-2-2 a /l)qB#
* @version 1.0 {9;CNsd
*/ >#~& -3
public class ImprovedMergeSort implements SortUtil.Sort { >j(_[z|v3
cr?Q[8%t1
private static final int THRESHOLD = 10; BsqP?/
,nLy4T&"
/* q#ClnG*
* (non-Javadoc) Ou!2[oe@M
* bvr^zH,C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xH(lm2kvT
*/ 9_rYBX
public void sort(int[] data) { #TX/aKr:
int[] temp=new int[data.length]; E+R1 !.
mergeSort(data,temp,0,data.length-1); mD0f<gJ1
} m=A(NKZ
m}aB?+i
private void mergeSort(int[] data, int[] temp, int l, int r) { .4M.y:F
int i, j, k; tI TS1
int mid = (l + r) / 2; RJ ||}5
if (l == r) aS{n8P6vW
return; ;I 9&]
if ((mid - l) >= THRESHOLD) 6YLj^w] %
mergeSort(data, temp, l, mid); 5k3b3&
else !&ayYu##{
insertSort(data, l, mid - l + 1); nE&@Q
if ((r - mid) > THRESHOLD) >:S?Mnv6
mergeSort(data, temp, mid + 1, r); ZaDyg"Tw+
else # 448-8x
insertSort(data, mid + 1, r - mid); C]eSizS.
'}JhzKNj
for (i = l; i <= mid; i++) { X!Mx5fg
temp = data; B=yqW
} K{cD+=]{
for (j = 1; j <= r - mid; j++) { DV+xg3\(>1
temp[r - j + 1] = data[j + mid]; t?ZI".>
} +xSHL|:b
int a = temp[l]; ^aMg/.j
int b = temp[r]; g\(G\ tnu>
for (i = l, j = r, k = l; k <= r; k++) { )}]g] g
if (a < b) { DiScFx|rE
data[k] = temp[i++]; 3yY}04[9<
a = temp; (GuzN
} else { nntuLuW
data[k] = temp[j--]; 2*< nu><b
b = temp[j]; w%VU/6~
} HU}7zK2
} C:* *;=.
} YTX,cj#D^&
i]y<|W)Q3
/** :O?MSS;~
* @param data FLCexlv^
* @param l \H~T>j{N
* @param i axRV:w;E<
*/ FQ2
private void insertSort(int[] data, int start, int len) { a %'the
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _AYK435>N
} TJpD{p}
} V _/%b)*
} el<s8:lA
} B5VKs,g
ygS;$2m%2
堆排序： y$F'(b|)
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package org.rut.util.algorithm.support; Ae^~Cz1qz
3!Ij;$
import org.rut.util.algorithm.SortUtil; tr3!d_
?|C2*?hZ+
/** %lx!.G
* @author treeroot @* jz o
* @since 2006-2-2 e&F8m%t
* @version 1.0 "a>q`RaIQ"
*/ 5 +YH.4R
public class HeapSort implements SortUtil.Sort{ ]^n7
N1S{suic
/* (non-Javadoc) {G0T$,'DR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oo8VeRZ
*/ &yTqZ*Yuk
public void sort(int[] data) { +z\^t_"f
MaxHeap h=new MaxHeap(); 9y8&9<#
h.init(data); S6M}WR^,
for(int i=0;i h.remove(); +nhLIO{{L
System.arraycopy(h.queue,1,data,0,data.length); Mj?`j_X
} /-qNh>v4
:&rt)/I
private static class MaxHeap{ k&q;JyUi
kT66;Y[
void init(int[] data){ B=T'5&
this.queue=new int[data.length+1]; nH'e?>x~e
for(int i=0;i queue[++size]=data; Z1f8/?`W
fixUp(size); D~flJR
} cJ n=
} sPQQ"|wU
)0W{]2
private int size=0; xJvmhN/c
L>NL:68yN
private int[] queue; |A9F\A->4
"]x'PI 4J
public int get() { 5iw<>9X*
return queue[1]; fLD,5SN
} ~i{(<.he
c(E{6g?
public void remove() { v2\FA(BPn
SortUtil.swap(queue,1,size--); )Y0!~# `
fixDown(1); (ejvF):|
} &|ex`nwc0
file://fixdown rgv?gaQ>
private void fixDown(int k) { l -mfFN
int j; w"|L:8
while ((j = k << 1) <= size) { 1..+F0U
if (j < size %26amp;%26amp; queue[j] j++; a=1@*ID
if (queue[k]>queue[j]) file://不用交换 o]_dJB
break; q=m'^ ,gPS
SortUtil.swap(queue,j,k); oj<gD
k = j; $am$EU?s
} t!X.|`h
} :zbQD8jv
private void fixUp(int k) { Hqx-~hQO
while (k > 1) { KYhwOGN
int j = k >> 1; b<ZIWfs
if (queue[j]>queue[k]) 9(7-{,c
break; '<xXK@=KEI
SortUtil.swap(queue,j,k); "ycJ:Xv49
k = j; P%VSAh\|n
} ({)+3]x
} mb3"U"ohs
4Uo&d#o)C-
} 7`Ak)F:V
*W1dG#Np}
} 6OIte-c
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SortUtil： I)[DTCJ~
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package org.rut.util.algorithm; :#ik. D
nEy&>z
import org.rut.util.algorithm.support.BubbleSort; ,HV(l+k {|
import org.rut.util.algorithm.support.HeapSort; 5` ~JPt
import org.rut.util.algorithm.support.ImprovedMergeSort; IdYt\^@>
import org.rut.util.algorithm.support.ImprovedQuickSort; RJ&RTo
import org.rut.util.algorithm.support.InsertSort; xn(kKB.
import org.rut.util.algorithm.support.MergeSort; ?4&e;83_#y
import org.rut.util.algorithm.support.QuickSort; vWv"
import org.rut.util.algorithm.support.SelectionSort; rfJz8uF%
import org.rut.util.algorithm.support.ShellSort; $6 9&O
. iI
/** XFpjYwn
* @author treeroot {9pZ)tB
* @since 2006-2-2 [kB7@o
* @version 1.0 UHkMn
*/ N!=v4f
public class SortUtil { Lv7(st%`
public final static int INSERT = 1; pa3{8x{9m
public final static int BUBBLE = 2; QO~P7r|A
public final static int SELECTION = 3; uyWunpT
public final static int SHELL = 4; 2- h{N
public final static int QUICK = 5; q:0N<$63
public final static int IMPROVED_QUICK = 6; p38-l'{#
public final static int MERGE = 7; *n ]GsOOn
public final static int IMPROVED_MERGE = 8; q~o<*W
public final static int HEAP = 9; &`r-.&Y
m?}6)\ob
public static void sort(int[] data) { p27~>xQ
sort(data, IMPROVED_QUICK); P|E| $)m
} rJ4S%6w
private static String[] name={ FVbb2Y?R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f~R(D0@
}; /-'}q=M
%)1?TU
private static Sort[] impl=new Sort[]{ ;[YG@-"XZ
new InsertSort(), fU}ub2_in
new BubbleSort(), "+nRGEs6
new SelectionSort(), cwlRQzQ(
new ShellSort(), 4e7-0}0
new QuickSort(), s 5Qcl;}
new ImprovedQuickSort(), 4E+e}\r:6
new MergeSort(), bsli0FJSh'
new ImprovedMergeSort(), JFmC\
new HeapSort() pYEMmZ?L
}; 7xlkZF
X`K<>0.N
public static String toString(int algorithm){ lrE5^;/s1
return name[algorithm-1]; 8/#A!Ww]
} Pmx-8w
)2o?#8J
public static void sort(int[] data, int algorithm) { h7oo7AP
impl[algorithm-1].sort(data); JPHL#sKyz
} +3BN}
^[`%&uj!g
public static interface Sort { SKN`2[ahD
public void sort(int[] data); u c)eil
} [|$h*YK
VCkq"f7cw
public static void swap(int[] data, int i, int j) { &Z@o Q
int temp = data; RbnVL$c
data = data[j]; N>`Aw^ _@&
data[j] = temp; +Kc
} &r/Mi%
} nR~@#P\