[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; ^MVOaV65
} 7mL1$i6=
int i1=l; u\km_e
int i2=mid+1; EF;B)y=
for(int cur=l;cur<=r;cur++){ _S CY e
if(i1==mid+1) IEWl I
data[cur]=temp[i2++]; BL%3[JQ
else if(i2>r) "@rHGxK
data[cur]=temp[i1++]; 1+Vei<H$
else if(temp[i1] data[cur]=temp[i1++]; }xY|z"&
else 7<k@{xI/
data[cur]=temp[i2++]; MI~QXy,
} `0-i>>
} 'lmjZ{k
|RDE/
} #q8/=,3EG
7r pTk&`
改进后的归并排序: 5xa!L@)`wF
(V"7H
package org.rut.util.algorithm.support; @== "$uRw
~O 4@b/!4
import org.rut.util.algorithm.SortUtil; ~xc0Ky?8
g^^^fKUp)
/** Ah zV?6e
* @author treeroot 7*4i0{]
* @since 2006-2-2 ][~rk?YY
* @version 1.0 x_= 3!)
*/ )7Oj
public class ImprovedMergeSort implements SortUtil.Sort { M*dou_Q
=-G4BQ
private static final int THRESHOLD = 10; d%oHcn
!@>:k3DC&
/* sO)!}#,
* (non-Javadoc) ca%XA|_J
* p&HkR^.S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }mS+%w"j
*/ fg GTm:
public void sort(int[] data) { v=D4O.
int[] temp=new int[data.length]; r1sA^2g.
mergeSort(data,temp,0,data.length-1); pzU:AUW
} \G6V-W
D~,iI7ac
private void mergeSort(int[] data, int[] temp, int l, int r) { 5=;'LWXCJ
int i, j, k; GGFrV8
int mid = (l + r) / 2; x^ sTGd
if (l == r) dz?Ey~;M
return; Rz33_ qA
if ((mid - l) >= THRESHOLD) &9xcP.3
mergeSort(data, temp, l, mid); 'he&h4fm
else 5~"m$/yE
insertSort(data, l, mid - l + 1); ;5}"2hU>
if ((r - mid) > THRESHOLD) ;AT~?o`n
mergeSort(data, temp, mid + 1, r); mMad1qCi7
else S?Uvt?
insertSort(data, mid + 1, r - mid); )lVplAhZD
,m)YL>k
for (i = l; i <= mid; i++) { KPa&P:R3
temp = data; SuA`F|7?P
} -yY]0
for (j = 1; j <= r - mid; j++) { \X;)Kt"
temp[r - j + 1] = data[j + mid]; $PTl{
} ~93+Oxg
int a = temp[l]; _\AT_Zmy
int b = temp[r]; HE3x0H}o>
for (i = l, j = r, k = l; k <= r; k++) { Y^,G} &p
if (a < b) { {^Q1b.=
data[k] = temp[i++]; &P>a
a = temp; /^Zgv-n
} else { '>UQsAvm
data[k] = temp[j--]; s=)1:jYk
b = temp[j]; d~O)mJ J
} g=kuM
} 5~xv"S(E}
} t8S,C4
WSV% Oy3V
/** q]z%<`.9*
* @param data !*=+E%7
* @param l (k>I!Z/&2
* @param i P!lTK
*/ YDiru
private void insertSort(int[] data, int start, int len) { = k>ygD_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c`!8!R
} wfBf&Z0{
} > 0NDlS%Q:
} X:gE mcXc
} 2]-xmS>|b
"?Xb$V7
堆排序： -'::$ {
Y1U\VU
package org.rut.util.algorithm.support; T~-PT39E
C-L["O0[
import org.rut.util.algorithm.SortUtil; jxA*Gg3cT5
Ed&M
/** EyPF'|Qtn
* @author treeroot Mj-B;r
* @since 2006-2-2 aG/L'weR
* @version 1.0 -S*MQA4
*/ zrCQEQq
public class HeapSort implements SortUtil.Sort{ 99..]
=;@?bTmqD
/* (non-Javadoc) Zk75GC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pbb6?R,
*/ Xu#K<#V
public void sort(int[] data) { 00(#_($
MaxHeap h=new MaxHeap(); <MoKTP-<
h.init(data); z9[BQ(9t
for(int i=0;i h.remove(); \Dn an5H/
System.arraycopy(h.queue,1,data,0,data.length); %.;`0}b
} 5Rec~&v
c<j+"
private static class MaxHeap{ .f]2%utHB
>J No2
void init(int[] data){ "<I*ViZ
this.queue=new int[data.length+1]; ia}V8i
for(int i=0;i queue[++size]=data; EkEU}2
fixUp(size); _f5n t:-
} J`4{O:{4
} X:Z*7P/
BSib/)p
private int size=0; 2 .)`8|c9
#GT4/Ej}W
private int[] queue; &DgJu.
b#[7A
public int get() { B'"RKs]
return queue[1]; JHZ`LWq
} z4yV1
C0@[4a$8f
public void remove() { YjM_8@<
SortUtil.swap(queue,1,size--); IrZ!.5%tV
fixDown(1); nd/.]"
} RY]Vo8
file://fixdown ^sA"&Vdr^
private void fixDown(int k) { }yW*vy6`
int j; 4]$$ar)
while ((j = k << 1) <= size) { /Sag_[i
if (j < size %26amp;%26amp; queue[j] j++; )+S^{tt
if (queue[k]>queue[j]) file://不用交换 =(Ll}V,
break; :>'4@{'
SortUtil.swap(queue,j,k); XV> )[Nd\H
k = j; `K^j:fE7n
} ] oh.w
} ?g21U97Q
private void fixUp(int k) { uNn]hl|x
while (k > 1) { sjISVJ?
int j = k >> 1; M)1?$'Aq
if (queue[j]>queue[k]) _(Qec?[^Ps
break; c<gvUVHIxR
SortUtil.swap(queue,j,k); ;^K4kK&f
k = j; *j0kb"#
} 17nONhh
} .;&1"b8G
iEJY[P1
} k5%:L2FO
5|E_ ,d!v
} >pV|c\
yA/b7x-c
SortUtil： k}yUD 0Y
(gn)<JJS}
package org.rut.util.algorithm; 9Xv>FVG!
pg%'_+$~m
import org.rut.util.algorithm.support.BubbleSort; [aK7v{Wu
import org.rut.util.algorithm.support.HeapSort; UF)4K3X
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Cs5A0xo#s
import org.rut.util.algorithm.support.ImprovedQuickSort; IC6}s
import org.rut.util.algorithm.support.InsertSort; w/`I2uYu
import org.rut.util.algorithm.support.MergeSort; 9ntXLWK7e
import org.rut.util.algorithm.support.QuickSort; Yb<t~jm
import org.rut.util.algorithm.support.SelectionSort; 3O:gZRxK
import org.rut.util.algorithm.support.ShellSort; )aOPR|+
7;UUS1
/** }BpCa6SAs
* @author treeroot ) DzbJ}
* @since 2006-2-2 )9L:^i6
* @version 1.0 V_&>0P{q
*/ k8}*b&+{vz
public class SortUtil { ZPT6 pJ
public final static int INSERT = 1; U2DE"
public final static int BUBBLE = 2; pL{h1^O}
public final static int SELECTION = 3; ib4shaN`
public final static int SHELL = 4; [_&\wHX
public final static int QUICK = 5; vj+x(
public final static int IMPROVED_QUICK = 6; 26c,hPIeXY
public final static int MERGE = 7; D=w5Lks
public final static int IMPROVED_MERGE = 8; a|*{BlY
public final static int HEAP = 9; q&h&GZ
a]<y*N?qu
public static void sort(int[] data) { F9sVMV
sort(data, IMPROVED_QUICK); [f'V pId8
} c&1:H1#
private static String[] name={ <_S>-;by
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H0zKL]D'>
}; ltKUpRE\?
W?5u O
private static Sort[] impl=new Sort[]{ rpk )i:k\
new InsertSort(), H5f>Q0jq
new BubbleSort(), K[%)_KW
new SelectionSort(), IpX>G]"-C
new ShellSort(), jpl"KN?X
new QuickSort(), $YM>HZe-
new ImprovedQuickSort(), }{J5)\s9
new MergeSort(), U2=PmS P
new ImprovedMergeSort(), (p2jigP7a[
new HeapSort() 2qY`*Y.2
}; "T`Q,
]ov>VF,<
public static String toString(int algorithm){ ;]* %wX
return name[algorithm-1]; c~B[<.Qj
} 5",@!1ju
qSRE)C=)
public static void sort(int[] data, int algorithm) { 9sQ4 $
impl[algorithm-1].sort(data); 2|xNT9RW
} >tfy\PY:
G@Z,Hbgm
public static interface Sort { vJ__jO"Sq
public void sort(int[] data); ?U~9d"2=
} K&zp2V
'eNcQJh
public static void swap(int[] data, int i, int j) { O7p>"Bh
int temp = data; )z'LXy8
data = data[j]; H pHXt78
data[j] = temp; H"_ZqEg
} _lrCf
} n\f8%z