[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; cZF;f{t
} v&,VC~RN-J
int i1=l; 0$h$7'a
int i2=mid+1; 6]A\8Ty
for(int cur=l;cur<=r;cur++){ lfhKZX
if(i1==mid+1) DmA!+
data[cur]=temp[i2++]; "1TM
else if(i2>r) qvE[_1QCc
data[cur]=temp[i1++]; ['`'&+x&!
else if(temp[i1] data[cur]=temp[i1++]; ;Wm)e~`,
else ,r,;2,;6nd
data[cur]=temp[i2++]; ;j\$[4W.i
} ~(P\F&A(&
} >h-6B=
?Lb7~XKt\
} Ps5wQaS
YZu#0)
改进后的归并排序: #Z5Wk
_BaS\U%1(
package org.rut.util.algorithm.support; n/Z =q?_
0~5}F^8[L
import org.rut.util.algorithm.SortUtil; &I_!&m~
r<H^%##,w
/** R2f,a*>
* @author treeroot 2>$L>2$
* @since 2006-2-2 ! r\ktX
* @version 1.0 wm[d5A4
*/ \Le#+P
public class ImprovedMergeSort implements SortUtil.Sort { zq>"a&Y,
(MU7
private static final int THRESHOLD = 10; F?Nk:# V
D4S?bZFHo
/* 6>7LFV1tvy
* (non-Javadoc) HpSfI7
* lFt{:HfX-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .tZ$a_O
*/ e%7P$.
public void sort(int[] data) { aV#;o9H{
int[] temp=new int[data.length]; 9cPucKuj
mergeSort(data,temp,0,data.length-1); "Z?":|%7
} pl/$@K?L
a m%{M7":7
private void mergeSort(int[] data, int[] temp, int l, int r) { +/8?+1E ^
int i, j, k; O3GaxM\x
int mid = (l + r) / 2; td$Jx}'A
if (l == r) #Ih(2T i
return; }eK*)
if ((mid - l) >= THRESHOLD) \zDV|n~{w
mergeSort(data, temp, l, mid); ZI]K+jza
else nrhpId
insertSort(data, l, mid - l + 1); 4tKf
if ((r - mid) > THRESHOLD) AU\!5+RDB
mergeSort(data, temp, mid + 1, r); ZWW}r~d{
else -<.NEV
insertSort(data, mid + 1, r - mid); }+3~y'k
2Rt ZTn
for (i = l; i <= mid; i++) { Ki\jiflc7
temp = data; (~o+pp!
} 'm((G4
for (j = 1; j <= r - mid; j++) { *Y?]="8c#;
temp[r - j + 1] = data[j + mid]; f 8U;T$)
} j0M;2 3@[
int a = temp[l]; YR#1[fe*_
int b = temp[r]; 0M.[) @
for (i = l, j = r, k = l; k <= r; k++) { ZS;kCdL
if (a < b) { ZXkAw sr
data[k] = temp[i++]; 7:<>#
a = temp; ^el:)$
} else { Pk2"\y@q/
data[k] = temp[j--]; Z)4P>{
b = temp[j]; YZD]<ptR
} MkG->*
} Jrl xa3 [
} >rGlj
SjU6+|l
/** m8`A~
* @param data 1 crjRbi
* @param l F.hC%Ncu
* @param i OQyOv%g5C
*/ GQ8P}McA
private void insertSort(int[] data, int start, int len) { pc>R|~J{2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;^]F~x}
} 1Qkuxw
} 3g?T,|2K
} 8ttw!x69)_
} Ric$Xmu
#SOe&W5
堆排序： 4QDzG~N4)|
9`b3=&i\
package org.rut.util.algorithm.support; o!&*4>tF
)A"7l7?.n)
import org.rut.util.algorithm.SortUtil; :W55JD'
BJTljg({o
/** XoOe=V?I )
* @author treeroot c Ix(;[U
* @since 2006-2-2 eIl&=gZ6>
* @version 1.0 Su~`jRN$
*/ 3+'w%I
public class HeapSort implements SortUtil.Sort{ ~yg9ZM
_^ZII
/* (non-Javadoc) dY^~^<{Lj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MDt4KD+bZ
*/ .d,Zx
public void sort(int[] data) { >n62csO
MaxHeap h=new MaxHeap(); ==9Ez
h.init(data); XO>Y*7rO
for(int i=0;i h.remove(); &bNj/n/
System.arraycopy(h.queue,1,data,0,data.length); #/6X44 *u
} <Do89
>~:]+q
private static class MaxHeap{ 6w#v,RDEu
e V#H"fM
void init(int[] data){ c{0?gt.
this.queue=new int[data.length+1]; !LA#c'
for(int i=0;i queue[++size]=data; IuL]V TY
fixUp(size); u^$ CR
} %8/$CR
} x(Z@R\C-a
=>U~ligu
private int size=0; 7;V5hul
"`wq:$R
private int[] queue; 2J5dZYW
8h=XQf6k0
public int get() { dEnhNPeRl
return queue[1]; A_+WY|#M
} X5=7DE]
O)?0G$0
public void remove() { |k0VJi
SortUtil.swap(queue,1,size--); V^D#i(5
fixDown(1); Gy5W;,$q
} qn .
file://fixdown uB?YJf .T@
private void fixDown(int k) { TnrMR1Zx
int j; JP]K\nQx'
while ((j = k << 1) <= size) { H+Wd#7l,
if (j < size %26amp;%26amp; queue[j] j++; .0 K8h:I
if (queue[k]>queue[j]) file://不用交换 \v<}{\.|$
break; R:E:Y|&#
SortUtil.swap(queue,j,k); LxO'$oKZV
k = j; 0J"3RTt
} &W%TY:Da|
} _nt%&f
private void fixUp(int k) { cW2:D$Pe
while (k > 1) { ,$Mw/fA
int j = k >> 1; :d;5Q\C`
if (queue[j]>queue[k]) 2t'&7>Ys{
break; :>;#/<3{
SortUtil.swap(queue,j,k); J&?kezs
k = j; S;C3R5*:
} gVc[`(@h
} 0qv)'[O
oT'XcMn
} Jq->DzSmj/
W~qo `r
} uE2Yn`Ha
ME(!xI//JZ
SortUtil： fHiCuF
VmW_,
package org.rut.util.algorithm; b({2|R
BdTj0{S1u
import org.rut.util.algorithm.support.BubbleSort; j8b:+io
import org.rut.util.algorithm.support.HeapSort; Cn,dr4J[
import org.rut.util.algorithm.support.ImprovedMergeSort; 6eBQ9XV
import org.rut.util.algorithm.support.ImprovedQuickSort; LLMkv!%D
import org.rut.util.algorithm.support.InsertSort; Y+N87C<
import org.rut.util.algorithm.support.MergeSort; sr\MQ?\fB
import org.rut.util.algorithm.support.QuickSort; DmYm~hzJ
import org.rut.util.algorithm.support.SelectionSort; z t1Q_;
import org.rut.util.algorithm.support.ShellSort; W$&Q.Z
6 B )
/** ]PFc8qv{
* @author treeroot fAK
* @since 2006-2-2 ?'%&2M zM
* @version 1.0 $t]DxMd
*/ _ n>0!
public class SortUtil { {>:2Ff]O:
public final static int INSERT = 1; cIX59y#7
public final static int BUBBLE = 2; :p{iBDA
public final static int SELECTION = 3; f,$CiZ"
public final static int SHELL = 4; `4o;Lz~
public final static int QUICK = 5; IRQ(/:]
public final static int IMPROVED_QUICK = 6; X!@Gv:TD
public final static int MERGE = 7; gyPF!"!5dq
public final static int IMPROVED_MERGE = 8; h(Z7a%_
public final static int HEAP = 9; O;XF'r_
Og["X0j
public static void sort(int[] data) { myYe~f4=HQ
sort(data, IMPROVED_QUICK); 9'tM65K
} mb#)w`<
private static String[] name={ Yv{AoL~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6l=n&YO
}; {Hb _o)S
Vq*p?cF .
private static Sort[] impl=new Sort[]{ (GeJBw,Q
new InsertSort(), e'jR<ln|
new BubbleSort(), 2`z+_DA
new SelectionSort(), E?;W@MJi
new ShellSort(), m'S-h'a
new QuickSort(), h1BdASn_
new ImprovedQuickSort(), H=dj\Br`
new MergeSort(), /f#sg7)
new ImprovedMergeSort(), T57S!CJ^$5
new HeapSort() 6V8"[0U
}; P -Pt{:
3 3V/<v
public static String toString(int algorithm){ XdB8Oj~~
return name[algorithm-1]; d#(xP2
} Z/0M9 Q%
X9P-fF?0
public static void sort(int[] data, int algorithm) { 'HC4Q{b`
impl[algorithm-1].sort(data); F2u{Wzr_@
} bZ389dSn
kqyY:J
public static interface Sort { Jlzhn#5c-
public void sort(int[] data); }/=VnCfU
} NZl0sX.:
^Ab|\5^3
public static void swap(int[] data, int i, int j) { Oz+>I^Q
int temp = data; ]!f=b\-Av
data = data[j]; _K9jj
data[j] = temp; v/kYyz
} eVy,7goh
} 9;@6iv