[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; (~zdS.
} nu4GK}xI
int i1=l; gP^'4>Jr
int i2=mid+1; >x(^g~i
for(int cur=l;cur<=r;cur++){ rQ@,Y"
if(i1==mid+1) |o|0qG@g
data[cur]=temp[i2++]; 6pxj9@X+
else if(i2>r) 64hr|v
data[cur]=temp[i1++]; @fPiGu`L
else if(temp[i1] data[cur]=temp[i1++]; 'R,1Jmx
else *.n9D
data[cur]=temp[i2++]; xGPt5l<M&
} V?0|#=_mE
} (*^_wq-;
Kc}FMu
} ;'p X1T
/N{xFt/?
改进后的归并排序: eWW\m[k]}
a:H}c9$%
package org.rut.util.algorithm.support; JY_+p9KfyQ
T[~ak"M
import org.rut.util.algorithm.SortUtil; QJvA
*`=V"nXw$|
/** lf[(
* @author treeroot z^ KrR
* @since 2006-2-2 ?N&"WL^|
* @version 1.0 c3g\*)Jz"F
*/ X;6&:%ZL@^
public class ImprovedMergeSort implements SortUtil.Sort { g>T'R Vb
[[LCEw
private static final int THRESHOLD = 10; +w%MwPC7`
){L`hQ*=w
/* cQS}pQyYN
* (non-Javadoc) UTHGjE
* ~^KemwogPN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /8Ca8Ju
*/ `SFI\Y+WDT
public void sort(int[] data) { 7?Xfge%\
int[] temp=new int[data.length]; e9o(hL
mergeSort(data,temp,0,data.length-1); Cq}LKiu
} k0{Mq<V*%
=Q[5U9
private void mergeSort(int[] data, int[] temp, int l, int r) { Go+f0aig
int i, j, k; ){icI<
int mid = (l + r) / 2; i[T!{<
if (l == r) q71Tg
return; 0waQw7 E
if ((mid - l) >= THRESHOLD) h8$lDFo
mergeSort(data, temp, l, mid); \b{=&B[Q$'
else lHT?
insertSort(data, l, mid - l + 1); li$(oA2
if ((r - mid) > THRESHOLD) G'#a&6
mergeSort(data, temp, mid + 1, r); CQ"5bnR
else drNfFx2
insertSort(data, mid + 1, r - mid); [gqV}Y"Md
<eQS16
for (i = l; i <= mid; i++) { !xA;(<K[^
temp = data; 83OOM;'
} V`G)8?%Vy
for (j = 1; j <= r - mid; j++) { u=p([ 5]
temp[r - j + 1] = data[j + mid]; <Mxy&9}ic
} `:R8~>p
int a = temp[l]; gX.4I;
int b = temp[r]; }Q/xBC)
for (i = l, j = r, k = l; k <= r; k++) { !1-:1Whz8
if (a < b) { '<4/Md[
data[k] = temp[i++]; FJ}/g ?
a = temp; x_s9DkX
} else { [;83 IoU}
data[k] = temp[j--]; `>g: :
b = temp[j]; P)7SK&]r;=
} ~eA7:dZLb
} A@f`g[q
} xCiY jl$
rcY[jF
/** [8l8m6
* @param data " q0lh
* @param l j2k,)MHu!x
* @param i QUH USDT
*/ <t.yn\G-w
private void insertSort(int[] data, int start, int len) { kOs_]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @m<xpel
} 3l-8TR
} <;=?~QK%-
} W(9-XlYKE
} =M*31>"I0
E}b" qOV
堆排序： > CZ|Vx
:-69,e
package org.rut.util.algorithm.support; 9]xOuCb
tF O27z@
import org.rut.util.algorithm.SortUtil; k-*H=km
L|u\3.:
/** D0.7an6
* @author treeroot ^R! qxSj
* @since 2006-2-2 K\,)9:`t
* @version 1.0 z^ rf;
*/ ovvR{MTc
public class HeapSort implements SortUtil.Sort{ g-bHf]'
zr-HL:js
/* (non-Javadoc) J)"2^?!&B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l*e*jA_>:7
*/ a[1^)=/DM
public void sort(int[] data) { 5.q2<a :
MaxHeap h=new MaxHeap(); 9B{,q6
h.init(data); wJNiw)C
for(int i=0;i h.remove(); -2{NI.-Xd
System.arraycopy(h.queue,1,data,0,data.length); N! }p
} pW2NrBq@w
4%Z!*W*
private static class MaxHeap{ xVfAlN37(
)R(kXz=M
void init(int[] data){ wzwEYZN(q
this.queue=new int[data.length+1]; W_Z%CBjcT
for(int i=0;i queue[++size]=data; @4#q
fixUp(size); 0r*E$|zZ
} .hzzoLI2
} zn@<>o8hU
X3-pj<JLY
private int size=0; b8r?Dd"T8
hs!a'E
private int[] queue; &5h{XSv
o:W>7~$jr=
public int get() { "3(""0Q
return queue[1]; iVu
} KLBU8%
TWZ**S-
public void remove() { _zvCc%
SortUtil.swap(queue,1,size--); %@k@tD6
fixDown(1); l=GcgxD+"d
} m(i84~
file://fixdown /Nt#|C>
private void fixDown(int k) { 4>-'wMW")
int j; 3LN+gXmU
while ((j = k << 1) <= size) { @tGju\E"o
if (j < size %26amp;%26amp; queue[j] j++; 7jL+c~
if (queue[k]>queue[j]) file://不用交换 ePv3M&\J
break; ywTt<;
SortUtil.swap(queue,j,k); sEkfmB2J/
k = j; %IL] Wz<
} aMe]6cWHV>
} z$4g9
private void fixUp(int k) { ,R#pQ 4
while (k > 1) { 8Wqh 8$
int j = k >> 1; ?<)4_
if (queue[j]>queue[k]) ~_8Dv<"a
break; LM\H%=*L
SortUtil.swap(queue,j,k); b 5<&hN4g
k = j; 8eq*q
} l25_J.e
} U*(/eEtd-
>HNBTc=~t
} Ne#FBRu5
)eIC5>#.
} `@TWZ%f6
d9e_slx
SortUtil： Kh&W\\K
v3O+ ;4
package org.rut.util.algorithm; 7^)8DwAl
-<H\VT%98
import org.rut.util.algorithm.support.BubbleSort; bi/ AQ^
import org.rut.util.algorithm.support.HeapSort; FnxPM`Zx
import org.rut.util.algorithm.support.ImprovedMergeSort; cq+G0F+H
import org.rut.util.algorithm.support.ImprovedQuickSort; v=5H,4UMA
import org.rut.util.algorithm.support.InsertSort; HVjN<HIqM
import org.rut.util.algorithm.support.MergeSort; Pt5"q3ec{T
import org.rut.util.algorithm.support.QuickSort; A0X'|4I
import org.rut.util.algorithm.support.SelectionSort; 2^ uP[
import org.rut.util.algorithm.support.ShellSort; 7.)kG}q]
J>Pc@,y
/** PL} Wu=
* @author treeroot yC\dM1X
* @since 2006-2-2 A.tXAOM(VW
* @version 1.0 7>.d*?eao\
*/ 3E9 )~$
public class SortUtil { 2qd5iOhX+
public final static int INSERT = 1; [x{z}rYH
public final static int BUBBLE = 2; ,+2!&"zD
public final static int SELECTION = 3; PWciD '!
public final static int SHELL = 4; 6`Hd)T5{w
public final static int QUICK = 5; @=_4i&]$
public final static int IMPROVED_QUICK = 6; I;1W6uD=
public final static int MERGE = 7; |BGB60}]f
public final static int IMPROVED_MERGE = 8; O|K-UTWH%
public final static int HEAP = 9; MrjgV+P}[
&3gC&b^i
public static void sort(int[] data) { CWT#1L=
sort(data, IMPROVED_QUICK); ]2E#P.-!b
} +MZsL7%
private static String[] name={ dCA| )
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9K!kU6Gh
}; .`p,pt;
_E %!5u
private static Sort[] impl=new Sort[]{ 5PY4PT=G
new InsertSort(), ;k?Z,M:
new BubbleSort(), 'Em3;`/C*+
new SelectionSort(), 7N:3
new ShellSort(), uA-1VwW+N
new QuickSort(), S)LvYOOB@
new ImprovedQuickSort(), nA*Udrcn
new MergeSort(), 4y*"w*L
new ImprovedMergeSort(), '+EtnWHs
new HeapSort() (aC~0 #4
}; `D/<*e,#
W&~\@j]!D
public static String toString(int algorithm){ H!'Ek[s+
return name[algorithm-1]; ycq+C8J+Ep
} n(uzqd
4Jn+Ot.,d
public static void sort(int[] data, int algorithm) { [>$?/DM
impl[algorithm-1].sort(data); 35Ro85j
} N\l|3~
5ENU}0W
public static interface Sort { h"0)g:\
public void sort(int[] data); :o3>
} p=!12t
[]lMv ZW
public static void swap(int[] data, int i, int j) { L"KKW c
int temp = data; knfEbH
data = data[j]; MJ"@
data[j] = temp; +D+v j|fn
} VLPPEV-u
} 2Tp@;[!3