[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; pA7&
} UIgs/
int i1=l; cO%-Av~P
int i2=mid+1; N|-M|1w96
for(int cur=l;cur<=r;cur++){ n4,b?-E>(
if(i1==mid+1) LdnHz#
data[cur]=temp[i2++]; =]jc{Y%o
else if(i2>r) 2#LTd{
data[cur]=temp[i1++]; Y!s94#OaZ
else if(temp[i1] data[cur]=temp[i1++]; jWk1FQte
else =vJ:R[Ilw
data[cur]=temp[i2++]; #v+2W
} N\{Xhr7d
} @v&hr
)(yD"]co
} ci*rem
y(/"DUx
改进后的归并排序: F!.Z@y P
Qc1NLU9:
package org.rut.util.algorithm.support; KSkT6_<
j=b?WNK
import org.rut.util.algorithm.SortUtil; 8AL`<8$
{2"8^;
/** z6 T3vw
* @author treeroot >tc#Ofgzd
* @since 2006-2-2 f_v@.vnn.
* @version 1.0 1;8=,&
*/ D! TFb E
public class ImprovedMergeSort implements SortUtil.Sort { ramYSX@
]S!:p>R
private static final int THRESHOLD = 10; MYNNeO
7L3:d7=MIW
/* [`pp[J-~7
* (non-Javadoc) sZ,xbfZby
* 8Ld{Xg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SQ&nQzL
*/ <&JK5$l<X
public void sort(int[] data) { &%eWCe++
int[] temp=new int[data.length]; @GTkS!86
mergeSort(data,temp,0,data.length-1); +I~`Ob
} Lv;% z
|Z6M?n
private void mergeSort(int[] data, int[] temp, int l, int r) { -u+@5K;^Y
int i, j, k; 2tPW1"M.n
int mid = (l + r) / 2; ~4gOv
if (l == r) *iLlBE
return; b,C2(?hg
if ((mid - l) >= THRESHOLD) O_=2{k~s0
mergeSort(data, temp, l, mid); aia`mO]
else /`6Y-8e2
insertSort(data, l, mid - l + 1); u NmbR8Mx
if ((r - mid) > THRESHOLD) xib?XzxGo
mergeSort(data, temp, mid + 1, r); !@>_5p>q*
else Vx'82CIC
insertSort(data, mid + 1, r - mid); :\hcl&W:
j'L/eps?S
for (i = l; i <= mid; i++) { vVvx g0
temp = data; _{Z!$q6,
} `Xs3^FJt
for (j = 1; j <= r - mid; j++) { a ]~Rp
temp[r - j + 1] = data[j + mid]; ]'IZbx:
} rK` x<
int a = temp[l]; P ?^h
int b = temp[r]; SXqWq
for (i = l, j = r, k = l; k <= r; k++) { FR*CiaD1
if (a < b) { &~4;HjS
data[k] = temp[i++]; yV"k:_O{
a = temp; r_R(kns
} else { xA7>";sla[
data[k] = temp[j--]; (U_`Q1Jo
b = temp[j]; +lYo5\1=
} uX/K/4
} JRgrg&#
} |)TI&T;k
~,YxUn8@
/** f%,Vplb
* @param data %<dvdIB
* @param l TEJn;D<1I,
* @param i 2uSXC*Phz
*/ }xx"
private void insertSort(int[] data, int start, int len) { ,5*Z<[*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )wZ;}O
} L<D<3g|4
} 8NF93tqD6
} p]jkfsCjN
} SI)QX\is8
srbES6
堆排序： 4 H<.
R!)3{cjU@
package org.rut.util.algorithm.support; T6ihEb$C
^Uq%-a
import org.rut.util.algorithm.SortUtil; fk*I}pDx
we("#s1=
/** {{:QtkN
* @author treeroot 9-/u _$
* @since 2006-2-2 s78MXS?py
* @version 1.0 /]1$Soo
*/ ^5'pJ/BV
public class HeapSort implements SortUtil.Sort{ EjA3hHJ
uqotVil,
/* (non-Javadoc) nsA}A~(E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jT'09r3P
*/ 60\`TsFobT
public void sort(int[] data) { PEr &|H2
MaxHeap h=new MaxHeap(); Tv[|^G9x
h.init(data); Tv[h2_+E
for(int i=0;i h.remove(); a Fh9B\n
System.arraycopy(h.queue,1,data,0,data.length); 8(zE^W,[8"
} zi^?9n),
!-veL1r
private static class MaxHeap{ @D[tljc^
v:F_!Q
void init(int[] data){ V|{\8&2
this.queue=new int[data.length+1]; 4j1$1C{
for(int i=0;i queue[++size]=data; Wa5B;X~
fixUp(size); eS: 8Pn
} +dG3/vV
} eae`#>XP
$xU)t&Df
private int size=0; En9>onJ
`VrQ?s
private int[] queue; {Mpx33
~dBx<
public int get() { wi/qI(O!
return queue[1]; d=nv61]
} 9oU1IT9
('~}$%C
public void remove() { x%'5rnm|
SortUtil.swap(queue,1,size--); a.z)m}+
fixDown(1); |1pDn7
} BROn2aSx%
file://fixdown \1He9~6
private void fixDown(int k) { Y'^+KU
int j; XiL[1JM
while ((j = k << 1) <= size) { ;?G..,
if (j < size %26amp;%26amp; queue[j] j++; 'NNfzh
if (queue[k]>queue[j]) file://不用交换 Et! 6i7`]
break; OQ&'3hv{
SortUtil.swap(queue,j,k); Kh8
k = j; <nk9IAH
} ;Rf@S$
} s'^sT=b
private void fixUp(int k) { 7>V*gV?v
while (k > 1) { zCdcwTe
int j = k >> 1; p:;`X!
if (queue[j]>queue[k]) _Rb>py
break; Xqy9D ZIn
SortUtil.swap(queue,j,k); LO;?#e7
k = j; b%QcB[k[WB
} TCR|wi] kW
} $(]E$ek
P,rD{ 0~
} *.6m,QqJ(
n_{az{~
} y 2C Jk~
K=Z.<f
SortUtil： ]]NTvr
vD^Uod1
package org.rut.util.algorithm; FEO/RMh
z5J$".O`
import org.rut.util.algorithm.support.BubbleSort; (nwp s
import org.rut.util.algorithm.support.HeapSort; @R_ON"h
import org.rut.util.algorithm.support.ImprovedMergeSort; .(7m[-iF!
import org.rut.util.algorithm.support.ImprovedQuickSort; +a"f)4\
import org.rut.util.algorithm.support.InsertSort; O+?vQ$z
import org.rut.util.algorithm.support.MergeSort; 3wMnTT"At
import org.rut.util.algorithm.support.QuickSort; hkB|rhJgm
import org.rut.util.algorithm.support.SelectionSort; `^HK-t4q
import org.rut.util.algorithm.support.ShellSort; ]1 jhy2j
\4KV9wm
/** aH_0EBRc
* @author treeroot CB0p2WS_
* @since 2006-2-2 8shx7"
* @version 1.0 B|"-Ed
*/ {kghZur
public class SortUtil { Vb)NWXmyu
public final static int INSERT = 1; aL&nD1f=!-
public final static int BUBBLE = 2; 20]p<
public final static int SELECTION = 3; ?IG[W+M8
public final static int SHELL = 4; 8},:
public final static int QUICK = 5; t,u;"%go
public final static int IMPROVED_QUICK = 6; Kk).KgR
public final static int MERGE = 7; =gB8(1g8
public final static int IMPROVED_MERGE = 8; >9NC2%61S
public final static int HEAP = 9; "&/lF[q
@A|#/]S1
public static void sort(int[] data) { iS< ^MD
sort(data, IMPROVED_QUICK); R;zf x/
} uO)vGzt3^x
private static String[] name={ =6 3tp 9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z%1& t4$
}; 0DFVB%JdI
D\| U_>
private static Sort[] impl=new Sort[]{ v_Hy:O}R
new InsertSort(), M0T z('~s
new BubbleSort(), h'+F'1=
new SelectionSort(), 6rWb2b
new ShellSort(), '6cXCO-_P
new QuickSort(), ";;!c.!^
new ImprovedQuickSort(), of {K{(M7@
new MergeSort(), *,zrg%8
new ImprovedMergeSort(), n]6-`fpD
new HeapSort() #-o 'g!
}; fB 0X9iV6j
6OB3%R'p
public static String toString(int algorithm){ h\2iArw8
return name[algorithm-1]; F'-XAI <3
} +sV~#%%
/I((A/ks
public static void sort(int[] data, int algorithm) { f40OVT@g
impl[algorithm-1].sort(data); 9o4h~Imu
} "}Ikx tee
%OsxXO?
public static interface Sort { 6a<zZO`Z6+
public void sort(int[] data); 6Jq3l_
} cTq;<9Iew
3~{0X-
public static void swap(int[] data, int i, int j) { DJ9x?SL@KD
int temp = data; A+j!VM
data = data[j]; B>4/[ YHr;
data[j] = temp; Z6-ZAS(>m
} M!D6i5k,
} gWL`J=DiU