[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; \c}r6xOr
} "iGc'?/+
int i1=l; GqxK|G1
int i2=mid+1; iW~f
for(int cur=l;cur<=r;cur++){ h--bN*}H2
if(i1==mid+1) s%|J(0
data[cur]=temp[i2++]; eqCB2u"Jq
else if(i2>r) p~ItHwiT
data[cur]=temp[i1++]; \YS\*'F
else if(temp[i1] data[cur]=temp[i1++]; `<~P>
else rnE'gH(V'
data[cur]=temp[i2++]; _4Pi>
} E5Jk+6EcMa
} mH .I!
Z4' v
} r+u\jZ
`,[c??h
改进后的归并排序: JN)t'm[kyE
(p!AX<=z
package org.rut.util.algorithm.support; xpwzzO*U
iwJgU b
import org.rut.util.algorithm.SortUtil; `^vD4qD|
@oNrR$7
/** C:{'0m*jKs
* @author treeroot 5Ncd1
* @since 2006-2-2 th,qq
* @version 1.0 HfPeR8I%i
*/ yI<'J^1C[
public class ImprovedMergeSort implements SortUtil.Sort { Nl _Jp:8s
owhht98y(
private static final int THRESHOLD = 10; ]3'd/v@fT
!ZW0yCwLQ
/* ' M!_k+e
* (non-Javadoc) LlJvuQ 28
* }.zn:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [-ecKPx
*/ bX1ip2X lk
public void sort(int[] data) { Op{Mc$5a
int[] temp=new int[data.length]; =@>&kU%$&
mergeSort(data,temp,0,data.length-1); a\MJbBXv
} f9$q.a*
/'&LM\
private void mergeSort(int[] data, int[] temp, int l, int r) { -(EqBr@_
int i, j, k; [tN/}_]
int mid = (l + r) / 2; OHw6#N$\
if (l == r) VrK5a9*^
return; vI@8DWs
if ((mid - l) >= THRESHOLD) *#_jTwQe
mergeSort(data, temp, l, mid); 9^tyjX2
else ",m5}mk:4
insertSort(data, l, mid - l + 1); j3><J
if ((r - mid) > THRESHOLD) a=R-F!P)
mergeSort(data, temp, mid + 1, r); BJ5#!I%h
else QZfnoKz
insertSort(data, mid + 1, r - mid); J,7\/O(`A
5cU8GgN`
for (i = l; i <= mid; i++) { 53QP~[F8R]
temp = data; 7Fp2=j
} J98K:SAR
for (j = 1; j <= r - mid; j++) { LFC k6 R
temp[r - j + 1] = data[j + mid]; xjYFTb}!
} f8lww)^,v
int a = temp[l]; G r)+O
int b = temp[r]; ;/.ZYTD
for (i = l, j = r, k = l; k <= r; k++) { sIpK@BQ'
if (a < b) { cW RY[{v
data[k] = temp[i++]; ^RyrUb
a = temp; >7|37a
} else { fOJyY[
data[k] = temp[j--]; /%)J+K)
b = temp[j]; $f+9svq
} &Lw| t_y
} "O4Z).5q3
} P1kd6]s
= U5)m
/** g5.Z B@j
* @param data Z+?j8(:n
* @param l l},%g%}iMU
* @param i )JPcSy*
*/ ;8@A7`^
private void insertSort(int[] data, int start, int len) { D"MNlm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XxIUB(.QI
} 6Z$T&Ul{
} 3eB2=_V`
} QMIXz[9w
} d+(~{xK:
#E#70vWp\O
堆排序： l6&R g-
@*oi1_q
package org.rut.util.algorithm.support; Q~9:}_@
qRUz;M4
import org.rut.util.algorithm.SortUtil; h3:k$`_
{E9Y)Z9
/** cX*^PSM
* @author treeroot qG;WX n
* @since 2006-2-2 8S0)_L#S
* @version 1.0 ' o5,P/6
*/ sB6UlX;b:
public class HeapSort implements SortUtil.Sort{ %spR7J\"/
,Zdc
/* (non-Javadoc) 3y@'p(}Az
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |h#mv~cF
*/ ]`MRH[{
public void sort(int[] data) { RGiA>Z:W
MaxHeap h=new MaxHeap(); &t4j px
h.init(data); rO-Tr
for(int i=0;i h.remove(); O6`@'N>6P
System.arraycopy(h.queue,1,data,0,data.length); "^u|vCqw
} '?-GZ0oM
Y A;S'dxY
private static class MaxHeap{ nI6`/
,3^N_>d$W
void init(int[] data){ @A)gsDt9A
this.queue=new int[data.length+1]; sl)_HA7G
for(int i=0;i queue[++size]=data; % $ 5hC9
fixUp(size); j"c"sF\q
} VQX#P<
} 2lGq6Au:
d/;oNC+
private int size=0; N&=,)d~M
Jk`A}
private int[] queue; QtRKmry{
t.]oLG22r
public int get() { ed&,
return queue[1]; 0|d%@
} &359tG0@P
.>&kAf.
public void remove() { sB /*gO
SortUtil.swap(queue,1,size--); Yh4e\]ql~N
fixDown(1); sR#( \
} k{9s>l~'
file://fixdown 1MOQ/N2BR
private void fixDown(int k) { x3)qK6,\
int j; +f|u5c
while ((j = k << 1) <= size) { D7 .R NXo
if (j < size %26amp;%26amp; queue[j] j++; Vk[m$
if (queue[k]>queue[j]) file://不用交换 $NqT={!
break; T#T!a0
SortUtil.swap(queue,j,k); [t,7H
k = j; IX-ir
} #Jg)HU9
} 1J^{h5?lU
private void fixUp(int k) { xez~Yw2
while (k > 1) { n;4`IK|
int j = k >> 1; #Ey!?Z
if (queue[j]>queue[k]) Xa+ u>1"2"
break; ?/NxZ\
SortUtil.swap(queue,j,k); kyz_r6
k = j; jiz"`,-},O
} C2FewsRz
} 8L.Y0_x
->:G+<
} 2,'m]`;GNr
=3Y?U*d
} ]0g<][m
D24@lZ`g~
SortUtil： T[L
u9QvcD^'z
package org.rut.util.algorithm; 9 *Q/3|
{dhGSM7
import org.rut.util.algorithm.support.BubbleSort; ,H\EPmNHK
import org.rut.util.algorithm.support.HeapSort; sZ7{_}B
import org.rut.util.algorithm.support.ImprovedMergeSort; nO2-fW:9]
import org.rut.util.algorithm.support.ImprovedQuickSort; H/YZwDx,i
import org.rut.util.algorithm.support.InsertSort; (?D47^F &
import org.rut.util.algorithm.support.MergeSort; g&#.zJ[-
import org.rut.util.algorithm.support.QuickSort; ~M2w&g;1
import org.rut.util.algorithm.support.SelectionSort; 2t*@P"e!
import org.rut.util.algorithm.support.ShellSort; :J5xO%WA(
PL[7|_%
/** v4DF #O
* @author treeroot Mq8jPjL
* @since 2006-2-2 ZFY t[:
* @version 1.0 >y &9!G
*/ ?(n|ykXwc
public class SortUtil { A#\NVN8sk
public final static int INSERT = 1; `)/G5 fB
public final static int BUBBLE = 2; N{ @B@]
public final static int SELECTION = 3; 0Ou`&u
public final static int SHELL = 4; +K])&}Dw
public final static int QUICK = 5; Yu>VW\Fb
public final static int IMPROVED_QUICK = 6; 7kp$C?7K
public final static int MERGE = 7; *am.NH\
public final static int IMPROVED_MERGE = 8; ~8o's`
public final static int HEAP = 9; bO^#RVH
,nD:W
public static void sort(int[] data) { pZ}4'GnZI
sort(data, IMPROVED_QUICK); Uo#%f+t
} a=+qR:wT
private static String[] name={ DP6M4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9#IKb:9k
}; |X,T>{V?y
y'(l]F1]
private static Sort[] impl=new Sort[]{ ^w/_hY!4/
new InsertSort(), VPx"l5\
new BubbleSort(), A]id*RtY
new SelectionSort(), >gtKyn]
new ShellSort(), 5zWxI]4d\
new QuickSort(), K3Zc>QL{
new ImprovedQuickSort(), WLma)L`L
new MergeSort(), @kw#\%Uz
new ImprovedMergeSort(), (,#Rj$W
new HeapSort() p,.+i[V
}; AL74q[>
B{^o}:e
public static String toString(int algorithm){ ?>SC:{(
return name[algorithm-1]; z=J%-Hq>
} S-&[Tp+N
03Pa; n
public static void sort(int[] data, int algorithm) { tt2`N3Eu\
impl[algorithm-1].sort(data); .{%~4$yu7
} TR/'L!EE
:_E q(r
public static interface Sort { n8n(<
public void sort(int[] data); P$?3\`U;
} {1,]8!HBJ
P~$FgAV
public static void swap(int[] data, int i, int j) { ~GZ!;An
int temp = data; ;$gZ?&
data = data[j]; L5=Tj4`
data[j] = temp; #-?pY"N,
} }JyWy_Y
} , v,mBYaU