[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; 2+|r*2_glo
} X:FyNUa
int i1=l; ,:.8s>+i
int i2=mid+1; xR'd}>`
for(int cur=l;cur<=r;cur++){ r& RJ'z
if(i1==mid+1) {3Gj rE
data[cur]=temp[i2++]; F0m[ls$
else if(i2>r) Z(E.F,k
data[cur]=temp[i1++]; u`L*
else if(temp[i1] data[cur]=temp[i1++]; VQ~eg wJL
else nP=/XiCj
data[cur]=temp[i2++]; 5W{|?l{
} acpc[^'
} J(~xU0gd'
RplcM%YJn
} qyIy xJ
Cn9MboXX
改进后的归并排序: gi A(VUwI>
4[0.M
package org.rut.util.algorithm.support; 8W.-Y|[5?
=F*{O=
import org.rut.util.algorithm.SortUtil; I#yd/d5^
Erl@]P4
/** WsM/-P1Y
* @author treeroot gn 9CZ
* @since 2006-2-2 P.|g4EdND
* @version 1.0 @XF/hhGE_y
*/ zHj_q%A
public class ImprovedMergeSort implements SortUtil.Sort { [yAR%]i-7
`tsqnw
private static final int THRESHOLD = 10; * 8D(Lp1
J0Y-e39 `
/* "jl`FAu)q
* (non-Javadoc) E<_+Tc
* DB1Y`l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5al44[
*/ *Oe;JqQkK
public void sort(int[] data) { 4gm(gY>[
int[] temp=new int[data.length]; XN'X&J
mergeSort(data,temp,0,data.length-1); 20uR?/|@
} 01^W Py9l
F9SIC7}uH
private void mergeSort(int[] data, int[] temp, int l, int r) { hta$k%2
int i, j, k; kA:cz$)
int mid = (l + r) / 2; 8<ri"m,
if (l == r) ">RDa<H]
return; k@R)_,2HH
if ((mid - l) >= THRESHOLD) seH#v
mergeSort(data, temp, l, mid); *SZ*S%oS3
else M*c`@\
insertSort(data, l, mid - l + 1); ]pA}h.R#-
if ((r - mid) > THRESHOLD) Vi>kK|\b
mergeSort(data, temp, mid + 1, r); T+/Gz'
else -r82'3]
insertSort(data, mid + 1, r - mid); e{9(9qE"
}FRyG%
for (i = l; i <= mid; i++) { FCmS3KIa,
temp = data; M:(k7a+[^
} tL4xHa6v]
for (j = 1; j <= r - mid; j++) { R=M${u<t
temp[r - j + 1] = data[j + mid]; ]urcA,a
} f;%4O'
int a = temp[l]; akQtre`5sd
int b = temp[r]; 7[V'3
for (i = l, j = r, k = l; k <= r; k++) { !-4pr[C
if (a < b) { G>{;@u
data[k] = temp[i++]; nmN6RGx
a = temp; o*QhoDjc
} else { +kl@`&ga
data[k] = temp[j--]; ,k@fXoW
b = temp[j]; ^IM;D)X&:
} Fk 1M5Dm
} PHD$E s
} i@_|18F]`
*Qg/W?"m
/** :h3 Gk;u
* @param data te'<xfG
* @param l +Mv0X%(N
* @param i w>rglm&
*/ 9!FV.yp%F
private void insertSort(int[] data, int start, int len) { f5/ba9nI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }`
} c:~o e
} $- #M~eZv
} iygdX2
} D9c8#k9Y.
T cSj`-
堆排序： $K8ZxH1z@
3QS"n.d
package org.rut.util.algorithm.support; :d!.E$S
Q.6pmaXrb
import org.rut.util.algorithm.SortUtil; 6576RT
NCSb`SC:
/** .f&,~$e4
* @author treeroot Jp5~iC2d
* @since 2006-2-2 Vv=d*
* @version 1.0 l=EIbh
*/ Yq) wE|k/
public class HeapSort implements SortUtil.Sort{ 9[6*FAFJPP
8 s:sMU:Q
/* (non-Javadoc) l= !KZaH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UwdcU^xt9
*/ R^_/iy
public void sort(int[] data) { AytHnp\H
MaxHeap h=new MaxHeap(); b9w9M&?fT
h.init(data); {?BxVDD07
for(int i=0;i h.remove(); le|e 4f*+
System.arraycopy(h.queue,1,data,0,data.length); i':<Ro
} vD}y%}
b\VY)=U
private static class MaxHeap{ cD2}EqZ 9
A@du*5>(
void init(int[] data){ ](-:l6
this.queue=new int[data.length+1]; A*~zdZ p
for(int i=0;i queue[++size]=data; `Nu3s<O7CF
fixUp(size); o& $Fc8bH
} oe4Fy}Y_;
} aeE9dV~
!>;p^^e
private int size=0; Al' sY^B
{o5E#<)
private int[] queue; cq %=DZ
3MiNJi#=2
public int get() { zn>*^h0B
return queue[1]; +`_%U7p(
} i4v7x;m_p
srJ,Jr(
public void remove() { Bk>Ch#`Bw
SortUtil.swap(queue,1,size--); tX&Dum$
fixDown(1); pvP|.sw5G
} }O5c.3
file://fixdown ~%k<N/B
private void fixDown(int k) { VL&E2^*E
int j; a` 95eL}
while ((j = k << 1) <= size) { ft4J.oT
if (j < size %26amp;%26amp; queue[j] j++; z';p275
if (queue[k]>queue[j]) file://不用交换 KE&Y~y8O\
break; #:w/vk
SortUtil.swap(queue,j,k); ^'*9,.ltd
k = j; t!AHTtI
} D%Hz'G0|
} TJp(
private void fixUp(int k) { ,cYU
while (k > 1) { 2r,K/'
int j = k >> 1; DL_2%&k/
if (queue[j]>queue[k]) N3TkRJZ
break; FG38)/
SortUtil.swap(queue,j,k); C5\bnk{
k = j; qeb:n$
} e$45OL
} 8AOJ'~$
Nf%jLK~
} ="P3TP
;KWR/?ec
} peY(4#
%XMrSlSOp
SortUtil： W> s@fN9
s3W35S0Q3
package org.rut.util.algorithm; 89Svx5S
UsNr$MO {
import org.rut.util.algorithm.support.BubbleSort; Ts:3_4-k
import org.rut.util.algorithm.support.HeapSort; hT>h
import org.rut.util.algorithm.support.ImprovedMergeSort; 5^t68 WOl
import org.rut.util.algorithm.support.ImprovedQuickSort; z%Op_Ddp
import org.rut.util.algorithm.support.InsertSort; 'sn%+oN
import org.rut.util.algorithm.support.MergeSort; Hz`rw\\Xq
import org.rut.util.algorithm.support.QuickSort; jW}n6w5
import org.rut.util.algorithm.support.SelectionSort; {l-,Jbfi`
import org.rut.util.algorithm.support.ShellSort; { KE[8n
[9u/x%f(
/** :(c2YZ
* @author treeroot \5BI!<
* @since 2006-2-2 Z=_p
* @version 1.0 wciYv,
*/ .Kv>*__-Q
public class SortUtil { hY7Q$B<
public final static int INSERT = 1; WIb\+!
public final static int BUBBLE = 2; 3Wrl_V
public final static int SELECTION = 3; =3?t%l;n
public final static int SHELL = 4; 5@" bx=
public final static int QUICK = 5; @tdX=\[~
public final static int IMPROVED_QUICK = 6; KFor~A# D
public final static int MERGE = 7; Ash"D~
public final static int IMPROVED_MERGE = 8; g2l|NI#c^
public final static int HEAP = 9; IJ3[6>/M0
hun LV8z
public static void sort(int[] data) { WW2VW-Hk
sort(data, IMPROVED_QUICK); RXkE"H{
} *r!1K!c
private static String[] name={ dGAthbWJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v)N8vFdd
}; U5jY/e_
w:I^iI.
private static Sort[] impl=new Sort[]{ NDglse
new InsertSort(), 7 a !b}
new BubbleSort(), #.?DsK_:@
new SelectionSort(), &ME[H
new ShellSort(), d~tG#<^`
new QuickSort(), .Ej `!
new ImprovedQuickSort(), <~!7?ak
new MergeSort(), cpz}!D
new ImprovedMergeSort(), PQ.xmg2
new HeapSort() a"&@G=M@d
}; 2GLq#")P
5F+5J)h
public static String toString(int algorithm){ E)o/C(g
return name[algorithm-1]; HUr;ysw
} I! {AWfp0
{g@Wd2-J}
public static void sort(int[] data, int algorithm) { u{"o*udU
impl[algorithm-1].sort(data); Wznz
} aCcBmc
Qzw~\KY:
public static interface Sort { ?`_US7.@
public void sort(int[] data); HWT0oh]
} l %=yT6
E D*=8s2
public static void swap(int[] data, int i, int j) { 18z{d9'F
int temp = data; 90|p]I%
data = data[j]; "B*a| 'n!
data[j] = temp; GBzC<e#
} 5Qd |R
} k:4 Zc3