[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; VXQS~#dQj
} S+ymdZ)xZ`
int i1=l; 583ej2HPg
int i2=mid+1; _Ta9rDSP]
for(int cur=l;cur<=r;cur++){ fpM4q
if(i1==mid+1) !s.G$ JS<
data[cur]=temp[i2++]; jPPaL]
else if(i2>r) |(}uagfrd
data[cur]=temp[i1++]; XtT;UBE
else if(temp[i1] data[cur]=temp[i1++]; Bh:AY@k
else j8?$Hk
data[cur]=temp[i2++]; Q&(?D
} w!:u|
} .!KlN%As
[4 g5{eX
} .2Q`. o)
Wq0h3AjR
改进后的归并排序: |O\(<n S
/AJ^wY
package org.rut.util.algorithm.support; f<xF+wE
$%;NX[>j
import org.rut.util.algorithm.SortUtil; <3P?rcd,5K
n]ar\f
/** d`StBXG!
* @author treeroot R"5/
* @since 2006-2-2 ~Cks)mJs
* @version 1.0 Z@ h<xo*r
*/ ?@|1>epgd
public class ImprovedMergeSort implements SortUtil.Sort { 4I"QT(;
EYGJDv(S
private static final int THRESHOLD = 10; p!' "hx
I-kM~q_
/* U'";
* (non-Javadoc) 6TfL|W<
* jt"p Js'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eWqJ2Tt
*/ \b.2f+;3
public void sort(int[] data) { LAwX9q`
int[] temp=new int[data.length]; o|]xj'
mergeSort(data,temp,0,data.length-1); mb0${n~fz
} uP|AP
?-#w [J'6
private void mergeSort(int[] data, int[] temp, int l, int r) { |1g2\5Re
int i, j, k; -5p=gO
int mid = (l + r) / 2; m%ET!+
if (l == r) uAzVa!)
return; @)<uQ S
if ((mid - l) >= THRESHOLD) +/\.%S/
mergeSort(data, temp, l, mid); }-zx4<4BH
else iA^w2K
insertSort(data, l, mid - l + 1); &_" 3~:N8k
if ((r - mid) > THRESHOLD) k49CS*I
mergeSort(data, temp, mid + 1, r); WHbvb3'
else DbPw)aCj
insertSort(data, mid + 1, r - mid); |+!Jr_ By
^%go\ C ;
for (i = l; i <= mid; i++) { }y=7r!{@
temp = data; v bb mmv
} 4$IPz7
for (j = 1; j <= r - mid; j++) { ,"h$!k"$g
temp[r - j + 1] = data[j + mid]; `*}#Bks!
} )KXLL;]
int a = temp[l]; +]uy
int b = temp[r]; !G\1$"T$
for (i = l, j = r, k = l; k <= r; k++) { jXZKR(L
if (a < b) { HP]Xh~aP
data[k] = temp[i++]; UY}lJHp0
a = temp; WNm,r>6m
} else { S_?}H
data[k] = temp[j--]; &[3y_,
b = temp[j]; ]d$)G4X1
} E'MMhlo
} N_C\L2
} LYWQqxB
iY;)R|6
/** ucoBeNsHx
* @param data =b`>ggw#
* @param l *ZN"+wf\
* @param i ]NTHit^EX
*/ pNQd\nY|0
private void insertSort(int[] data, int start, int len) { Yv"uIj+']
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K\?vTgc(
} Ij=hmTl{P
} /&kZ)XOi
} Em4TEv
} xFg=Tyq:
L?al2aopF
堆排序： ~0/=5 dC
Onot<}K
package org.rut.util.algorithm.support; *:YW@Gbm
SvI
import org.rut.util.algorithm.SortUtil; 3kKXzIh
-MB,]m
/** b?w4Nx#
* @author treeroot .>}we ~O
* @since 2006-2-2 I9Z8]Q+2"
* @version 1.0 ge[\%
*/ D;Az>]>q
public class HeapSort implements SortUtil.Sort{ &X|z(vSJ$
h!d#=.R
/* (non-Javadoc) E(u[?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g@nE7H1V
*/ c!kbHZ<Z
public void sort(int[] data) { Oh8;YE-%
MaxHeap h=new MaxHeap(); <Xl G:nmY
h.init(data); 'BUdySng
for(int i=0;i h.remove(); 7Kh+m@q.
System.arraycopy(h.queue,1,data,0,data.length); v[Ar{t&
} Q@d X2
.bpxSU%X
private static class MaxHeap{ V]vk9M2q[l
-sc@SoS
void init(int[] data){ }]g>PY
this.queue=new int[data.length+1]; DVpqm6$Q
for(int i=0;i queue[++size]=data; hP9+|am%
fixUp(size); i(U*<1y
} bZtjg
} p=Vm{i7
66z1_lA
private int size=0; T[<9Ty'^
T_\GvSOI
private int[] queue; `D?vmSQ
0eUsvzz15
public int get() { uV%7|/fD
return queue[1]; 8c~b7F \
} a&y%|Gs^f
qU=$ 0M
public void remove() { pLk?<y
SortUtil.swap(queue,1,size--); FQ O6w'
fixDown(1); 8+GlM+>4
} L{\B9b2
file://fixdown %X#Wc:b
private void fixDown(int k) { iL5+Uf)E3
int j; ]1p&*xX:Bj
while ((j = k << 1) <= size) { .;$/nz6vk
if (j < size %26amp;%26amp; queue[j] j++; pT[C[h:
if (queue[k]>queue[j]) file://不用交换 b`%/*
break; =\_MJ?A$
SortUtil.swap(queue,j,k); Y{2\==~
k = j; #<!oA1MH4
} <\yM{ V\
} V-I_SvWv\
private void fixUp(int k) { i<&2Ffvq
while (k > 1) { xJZbax[
int j = k >> 1; YFsEuaV
if (queue[j]>queue[k]) t;E-9`N
break; ]M= 3Sn8}
SortUtil.swap(queue,j,k); Yo:>m*31
k = j; HfmTk5|/
} \.Q"fd?a_D
} WKmGw^
3QGg;
} I_eYTy-a`1
t5e%"}>7H
} }4ta#T Ea
JNk ]$ xz
SortUtil： ~f){`ZJc
Ks!.$y:x
package org.rut.util.algorithm; A^o
l<^#@SH
import org.rut.util.algorithm.support.BubbleSort; rWSw1(sAA
import org.rut.util.algorithm.support.HeapSort; 8[}MXMRdb
import org.rut.util.algorithm.support.ImprovedMergeSort; 1kTJMtZG~
import org.rut.util.algorithm.support.ImprovedQuickSort; d<: VoQM6M
import org.rut.util.algorithm.support.InsertSort; GQ)hZt0
import org.rut.util.algorithm.support.MergeSort; 8M:;9a8fh
import org.rut.util.algorithm.support.QuickSort; G4AX8@;U
import org.rut.util.algorithm.support.SelectionSort; &*L:4By)]
import org.rut.util.algorithm.support.ShellSort; lty`7(\
O,:ent|
/** "hpK8vQ
* @author treeroot UHweV:(|T
* @since 2006-2-2 pD.7ib^
* @version 1.0 lXL\e(ow
*/ Qh)@-r3
public class SortUtil { #).om*Xh
public final static int INSERT = 1; l0[jepmpiT
public final static int BUBBLE = 2; +<@7x16
public final static int SELECTION = 3; .U9NQwd
public final static int SHELL = 4; PS(9?rX#+
public final static int QUICK = 5; ]?mWnEi!z
public final static int IMPROVED_QUICK = 6; -twIF49
public final static int MERGE = 7; fd*=`+P
public final static int IMPROVED_MERGE = 8; A3yVT8
public final static int HEAP = 9; =4+UX*&i?.
tSE6m-
public static void sort(int[] data) { u|9^tHT>
sort(data, IMPROVED_QUICK); g8!!:fdu
} =@V4V} ?
private static String[] name={ 6+m)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pg*'2AT
}; K'N\"Y?>
9v<BO$ ,a
private static Sort[] impl=new Sort[]{ Lg_y1Mu7o
new InsertSort(), Zdj~B1
new BubbleSort(), B,|M
new SelectionSort(), u\&oiwSIP
new ShellSort(), S1E2E3
new QuickSort(), 09%q/-$
new ImprovedQuickSort(), H>;km$b +
new MergeSort(), a%Cq?HZ7
new ImprovedMergeSort(), @MAk/mb&
new HeapSort() ,t61IU3"
}; %!p14c*J H
X1#D}
public static String toString(int algorithm){ ^*%p]r
return name[algorithm-1]; =?vk n
} 9"_qa q
f+%J=Am
public static void sort(int[] data, int algorithm) { B58H7NH ;G
impl[algorithm-1].sort(data); Qf7]t-Kp
} 0MrtJNF]_O
9!gmS?f
public static interface Sort { ZUAWSJ,s
public void sort(int[] data); dUOjPq97
} X\X
}9<aX Y,
public static void swap(int[] data, int i, int j) { '1=/G7g
int temp = data; Ai(M06P:h
data = data[j]; RyIr_:&-~
data[j] = temp; !*?&V3!
} T1\Xz-1
} P}DrUND