[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; z?(QM:
} II(P
int i1=l; S[RVk=A1
int i2=mid+1; 8&v%>wxR@
for(int cur=l;cur<=r;cur++){ {Pe+d3Eoo
if(i1==mid+1) bYy7Ul6]
data[cur]=temp[i2++]; p;LF-R
else if(i2>r) :JzJ(q/
data[cur]=temp[i1++]; ''B}^yKEW
else if(temp[i1] data[cur]=temp[i1++]; kDWvjT
else n<MreKixE
data[cur]=temp[i2++]; :SVWi}:Co1
} sT>l ?L
} %>,Kd6bdg
rq^VOK|L
} Z|zT%8.8N
J\\o#-H
改进后的归并排序: T$4Utd5[z'
01o,9_|FL
package org.rut.util.algorithm.support; VRz9;=m
4|KtsAVp{
import org.rut.util.algorithm.SortUtil; >('Z9<|r:
eed!SmP
/** $~:|Vj5iZ\
* @author treeroot d7v_>
* @since 2006-2-2 \Gy+y`
* @version 1.0 8#15*'Y
*/ _E xd:
public class ImprovedMergeSort implements SortUtil.Sort { CI@qT}Y_
?.,2EC=+
private static final int THRESHOLD = 10; w(nQ:;oC
Y!AQ7F
/* 7)y +QU]
* (non-Javadoc) .0]Odf:@
* A]OVmw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "$|ne[b2
*/ J.n-4J#@
public void sort(int[] data) { i UW.$1l
int[] temp=new int[data.length]; G0v<`/|>}
mergeSort(data,temp,0,data.length-1); go5l<:9
} K?acRi
XN~r d,MZ%
private void mergeSort(int[] data, int[] temp, int l, int r) { _u8d`7$*%
int i, j, k; "9!CsloWhz
int mid = (l + r) / 2; '0/[%Q
if (l == r) %ysfFE
return; A@JZK+WB}
if ((mid - l) >= THRESHOLD) Iih]q
mergeSort(data, temp, l, mid); ^|=3sJ4[U
else 3Uni{Z]Q)
insertSort(data, l, mid - l + 1); *\F,?yU
if ((r - mid) > THRESHOLD) l*n4d[0J
mergeSort(data, temp, mid + 1, r); *]* D^'
else +AL(K:
insertSort(data, mid + 1, r - mid); +U,>D+
2f.4P]s`T
for (i = l; i <= mid; i++) { o'p[G]NQ1o
temp = data; [7gwJiK
} +xRSd *
for (j = 1; j <= r - mid; j++) { gqan]b_
temp[r - j + 1] = data[j + mid]; v6+<F;G3y>
} wM&WR2
int a = temp[l]; ?K^~(D8(
int b = temp[r]; 2^=.jML[
for (i = l, j = r, k = l; k <= r; k++) { nAW`G'V#
if (a < b) { ]LZ,>v
data[k] = temp[i++]; I xE}v%&
a = temp; iU a `<
} else { ]$?\,`
data[k] = temp[j--]; f)!7/+9>
b = temp[j]; %R LGO&
} f2RIOL,
} o:Q.XWa@MG
} jd?NN:7
{-)*.l=
/** x>~.cey
* @param data Q1?0]5
* @param l y`.m'n7>P
* @param i ^ ]CQd
*/ U Zc%XZ`"V
private void insertSort(int[] data, int start, int len) { [49Ae2W`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gPg2Ve0Qy
} nW`EBs
} #gY|T|
} 0@dN$e
} lF.yQ
!0 -[}vvU
堆排序： '7TT4~F
d3K-|
package org.rut.util.algorithm.support; keL!;q|r-)
?tFsSU
import org.rut.util.algorithm.SortUtil; .q9wyVi7GI
~Y'j8W
/** YR}By;Bq
* @author treeroot L% ?3VW
* @since 2006-2-2 ##clReS
* @version 1.0 TkSeDP
*/ &%`Y>\@f
public class HeapSort implements SortUtil.Sort{ /f) #CR0$
It3.
/* (non-Javadoc) mY !LGN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MJ0UZxnl
*/ (YH/#n1"{
public void sort(int[] data) { (GI]Uyn
MaxHeap h=new MaxHeap(); Y+'522er
h.init(data); g?d*cwtU
for(int i=0;i h.remove(); zCdzxb_h"
System.arraycopy(h.queue,1,data,0,data.length); >gLLr1L\
} f6zS_y9gn
JW-!m8
private static class MaxHeap{ F(#~.i
AV*eGzz`
void init(int[] data){ m5rJY/
this.queue=new int[data.length+1]; !_SIq`5]@
for(int i=0;i queue[++size]=data; ;l>C[6]
fixUp(size); W^AY:#eX~Q
} \w+a Q?e_
} nH% 1lD?:
y OLqIvN
private int size=0; BbdJR]N/!h
&i%1\o
private int[] queue; ccu13Kr>E
+1j+%&).
public int get() { njN]0l{p
return queue[1]; mtn+bV R%
} %:WM]dc
EU"J'?
public void remove() { CiSl0
SortUtil.swap(queue,1,size--); Yab=p 9V;;
fixDown(1); ~ GW8|tw
} eq#x~O4
file://fixdown -L%2*`-L$
private void fixDown(int k) { j1{\nP/
int j; uepL"%.@7|
while ((j = k << 1) <= size) { ]h6mJ{k
if (j < size %26amp;%26amp; queue[j] j++; T11;LSD
if (queue[k]>queue[j]) file://不用交换 K0Zq)<
break; X ?lF,p
SortUtil.swap(queue,j,k); |ZnRr
k = j; |U4t 8
} I{0bsTp;
} 9x40
private void fixUp(int k) { c@1q8,
while (k > 1) { Hz6yy*
int j = k >> 1; }th^l*g
if (queue[j]>queue[k]) }475c{
break; @lnM%
SortUtil.swap(queue,j,k); 3!V$fl0
k = j; p/f!\
} b-XC\
} wuQ>|\Zs
OK^0,0kS3
} bb^$]lT'
t|Ipxk.)
} p!~{<s]
"=BO,see9
SortUtil： Y4B<]C4
j2/3NF5&
package org.rut.util.algorithm; sUP!'Av
@~l?hf
import org.rut.util.algorithm.support.BubbleSort; P_w\d/3
import org.rut.util.algorithm.support.HeapSort; 7JNy;$]/
import org.rut.util.algorithm.support.ImprovedMergeSort; 2m?!!Weq
import org.rut.util.algorithm.support.ImprovedQuickSort; o-D,K dY
import org.rut.util.algorithm.support.InsertSort; ^QKL}xiV:
import org.rut.util.algorithm.support.MergeSort; 96.z\[0VZ
import org.rut.util.algorithm.support.QuickSort; qJ|n73yn
import org.rut.util.algorithm.support.SelectionSort; r4D6I,
import org.rut.util.algorithm.support.ShellSort; A'\jaB
", :Ta|
/** M:~/e8Xv
* @author treeroot /<s$Am
* @since 2006-2-2 {vJ)!'Eh
* @version 1.0 _>moza
*/ 7Z;w<b~
public class SortUtil { s;0eD5b>x
public final static int INSERT = 1; /@.c 59r
public final static int BUBBLE = 2; Q:x:k+O-
public final static int SELECTION = 3; ~BVK6
public final static int SHELL = 4; h!*++Y?&0
public final static int QUICK = 5; WSY&\8
public final static int IMPROVED_QUICK = 6; -|DSfI#j
public final static int MERGE = 7; @MV%&y*z.
public final static int IMPROVED_MERGE = 8; PZdYkbj
public final static int HEAP = 9; yq?_#r
_0rHxh7}q
public static void sort(int[] data) { $VrKoL\ScA
sort(data, IMPROVED_QUICK); P9p{j1*;
} g1uqsqYt
private static String[] name={ '1}rQqZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A!kNqJ2
}; a#0GmK
/Jc?;@{
private static Sort[] impl=new Sort[]{ |m%M$^sZ}
new InsertSort(), &E{5k{Y
new BubbleSort(), 6rnehv!p
new SelectionSort(), hao0_9q+
new ShellSort(), x Qh?
new QuickSort(), a9E!2o+,
new ImprovedQuickSort(), t|X |67W
new MergeSort(), sJlX]\RLQ
new ImprovedMergeSort(), mF>CH]k3
new HeapSort() FNDLqf!j
}; sQA{[l!aj
{1GW,T!#
public static String toString(int algorithm){ %;0w2W
return name[algorithm-1]; ^/W7Xd(s
} tH:K6^oR
}eX_p6bBw
public static void sort(int[] data, int algorithm) { X*~NE\
impl[algorithm-1].sort(data); gKZ{O
} |<.b:e\4
{/BEO=8q2
public static interface Sort { dv0TJ 0%
public void sort(int[] data); 0;)6ZU
} |zu>G9m
K)qbd~<\
public static void swap(int[] data, int i, int j) { sQ^>.yG
int temp = data; 8-5a*vV,>
data = data[j]; \QUvImT
data[j] = temp; ,h2q37
} We]X+>BlO
} ~MY(6P