[JAVA]用Java实现的各种排序

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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; /I7sa* i
} |Mo# +{~c
int i1=l; d#ya"e>
int i2=mid+1; N5}vy$t_P
for(int cur=l;cur<=r;cur++){ U"%k4]:A
if(i1==mid+1) pvI(hjMYPk
data[cur]=temp[i2++]; Uf4QQ`c#
else if(i2>r) ?OZbns~
data[cur]=temp[i1++]; S4qh8c
else if(temp[i1] data[cur]=temp[i1++]; O.TFV.
else ]N!SG@X+
data[cur]=temp[i2++]; >,@Fz)\:{'
} J}._v\Q7P
} @tEVgyN
E;VBoN [
} ;FMK>%Zq
qt^%jIv
改进后的归并排序: $C9<{zX
Co[[6pt~
package org.rut.util.algorithm.support; xXA$16kd
<j:3<''o
import org.rut.util.algorithm.SortUtil; l]sO[`X
O<6/0ub&+h
/** >z>UtT:
* @author treeroot $rFv(Qc^=
* @since 2006-2-2 ;f=:~go
* @version 1.0 .7ahz8v
*/ u+I-!3J87
public class ImprovedMergeSort implements SortUtil.Sort { /D1Bf:'(
gW/H#T,
private static final int THRESHOLD = 10; ,=$yvZs4[]
S~(4q#Dt-
/* &U4]hawbOU
* (non-Javadoc) ^}/YGAA
* 5\R8>G~H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?aOR ^ K
*/ qgI Jg6x/}
public void sort(int[] data) { ;jX_e(T3m
int[] temp=new int[data.length]; =!#DUfQf
mergeSort(data,temp,0,data.length-1); aI8wy-3I
} ,yV pB)IQ
EF"ar
private void mergeSort(int[] data, int[] temp, int l, int r) { Rn(|
int i, j, k; 5Hr(9)
int mid = (l + r) / 2; s$H5W`3
if (l == r) ;lYO)Z`3\
return; }s}9@kl;&
if ((mid - l) >= THRESHOLD) V9Au\
mergeSort(data, temp, l, mid); MYN1zYT6j
else 8^dGI9N
insertSort(data, l, mid - l + 1); !cSD9q*
if ((r - mid) > THRESHOLD) =_^g]?5i
mergeSort(data, temp, mid + 1, r); JYv&It
else elKQge
insertSort(data, mid + 1, r - mid); HoRLy*nU
/jj!DO#
for (i = l; i <= mid; i++) { _xUhDu%
temp = data; ]"/ *7NM
} ,l0s(Cg
for (j = 1; j <= r - mid; j++) { GExG1n-
temp[r - j + 1] = data[j + mid]; 5Qy,Pkje
} f1=8I_>=
int a = temp[l]; `&pb`P<`
int b = temp[r]; f{3FoN=z
for (i = l, j = r, k = l; k <= r; k++) { TUpEhQ+*
if (a < b) { D"^ogY#LK
data[k] = temp[i++]; \GMudN
a = temp; /23v]HEPy
} else { ,pLesbI
data[k] = temp[j--]; SCGQo.~,
b = temp[j]; LR9'BUfFv
} (/@o7&>*50
} +S/8{2%?DG
} V8n}"
f_Wn[I{
/** !^8'LMY<I
* @param data #e8CuS
* @param l KpwUp5K
* @param i ?[m5|ty#
*/ Llk`
private void insertSort(int[] data, int start, int len) { HnY: gu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3_33@MM
} ^xqh!
} c#Y9L+O
} u{H_q&1
} Pyyx/u+?@
brTB /(E
堆排序： l
xUSIck
package org.rut.util.algorithm.support; [Xz7.<0#U
Mm/GIa
import org.rut.util.algorithm.SortUtil; O$&p<~
n"dT^ g
/** c!841~p(Q
* @author treeroot .pdgRjlSn
* @since 2006-2-2 ?^"S%Vb
* @version 1.0 7gJy xQ
*/ 0;XnNz3&
public class HeapSort implements SortUtil.Sort{ /1OhW>W3eH
c69C=WQ
/* (non-Javadoc) ~z< ? Wh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SnXYq7`t
*/ F[?t"d
public void sort(int[] data) { 7 'f>
MaxHeap h=new MaxHeap(); D2?7=5DgS
h.init(data); WrG)&&d
for(int i=0;i h.remove(); p1|@F^Q
System.arraycopy(h.queue,1,data,0,data.length); H>Fy 2w
} |faXl3|
$hEX,
private static class MaxHeap{ Wo2M}]0
h[lh01z
void init(int[] data){ N86Hn]#
this.queue=new int[data.length+1]; lq%s/l
for(int i=0;i queue[++size]=data; #[i({1`^L
fixUp(size); xknP `T
} /\=g;o'
} ,>~92
a{-}8f6
private int size=0; |bBYJ
ZAiQofQ:2
private int[] queue; ]0O pd9
/Wj9Stj5
public int get() { P"xP%zqo
return queue[1]; O^IpfS\/
} R_Hdi~ k
kj-Sd^
public void remove() { +Uk/Zg w^
SortUtil.swap(queue,1,size--); "urQUpF
fixDown(1); tZ6KU11O
} H~$a6T"&
file://fixdown XGO_n{x
private void fixDown(int k) { n\P{Mc
int j; oR5`-
while ((j = k << 1) <= size) { U~T/f-CT
if (j < size %26amp;%26amp; queue[j] j++; ,m:MI/)p
if (queue[k]>queue[j]) file://不用交换 {WC{T2:8
break; IRcZyry
SortUtil.swap(queue,j,k); k'S/nF A
k = j; &PGU%"rN
} g.,IQ4o
} ,7/N=mz
private void fixUp(int k) { M/#<=XhA
while (k > 1) { [1Vh3~>J6
int j = k >> 1; un..UU4
if (queue[j]>queue[k]) W/&cnp\
break; p'_*>%4~
SortUtil.swap(queue,j,k); tt`b+NOH>
k = j; m"xw5aa>
} Z$+0gm\Cnw
} WAob"`8]
Ao=.=0os
} ^(a%B
0P!6 .-XU
} ;zp0,[r
g y&B"`
SortUtil： 7 bpV=
:.Np7[~{
package org.rut.util.algorithm; 'KXvn0
tTP"*Bb
import org.rut.util.algorithm.support.BubbleSort; CM~)\prks
import org.rut.util.algorithm.support.HeapSort; n*'|7#;
import org.rut.util.algorithm.support.ImprovedMergeSort; 2AU_<Hr6
import org.rut.util.algorithm.support.ImprovedQuickSort; \f%jN1z
import org.rut.util.algorithm.support.InsertSort; eyUo67'7
import org.rut.util.algorithm.support.MergeSort; IF@)L>-%
import org.rut.util.algorithm.support.QuickSort; Rb\\6BU0
import org.rut.util.algorithm.support.SelectionSort; $%sOL( r
import org.rut.util.algorithm.support.ShellSort; -x7b6o>$
&{"aD&
/** uZg Kex;c
* @author treeroot e6]u5;B r
* @since 2006-2-2 72Ft?;R
* @version 1.0 N0/DPZX7
*/ ?mrG^TV^+r
public class SortUtil { /Wk\6
public final static int INSERT = 1; LUJKR6oT{>
public final static int BUBBLE = 2; l*/I ;a$
public final static int SELECTION = 3; @@_f''f$
public final static int SHELL = 4; @Vc*JEW
public final static int QUICK = 5; H}X3nl\]
public final static int IMPROVED_QUICK = 6; {bl^O
public final static int MERGE = 7; rFdovfb
public final static int IMPROVED_MERGE = 8; R~;<}!Gtx
public final static int HEAP = 9; nKufVe
tE- s/
public static void sort(int[] data) { n|3ENN
sort(data, IMPROVED_QUICK); #(!>
} "M1[@xog
private static String[] name={ @/XA*9]l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 91e&-acA
}; 3fM~R+p
AEhh 6v
private static Sort[] impl=new Sort[]{ >STWt>s
new InsertSort(), @)|62Dv /
new BubbleSort(), |%we@ E
new SelectionSort(), r#3(;N{=
new ShellSort(), ;#cb%e3
new QuickSort(), ZB<goEg
new ImprovedQuickSort(), A2g+m
new MergeSort(), KK}^E_v
new ImprovedMergeSort(), x.~Z9j
new HeapSort() z4{H=
}; M-"%4^8_
jBarYg
public static String toString(int algorithm){ Hj$JXo[U
return name[algorithm-1]; WOG=Uy$
} 3<CCC+47
s9@/(_
public static void sort(int[] data, int algorithm) { t|%wVj?_
impl[algorithm-1].sort(data); BUuNI_?M#5
} K1]H~'
zT*EpIa+LS
public static interface Sort { vc5g4ud
public void sort(int[] data); :WJ[a#
} STL&ZO
+r"{$'{^
public static void swap(int[] data, int i, int j) { 6/Q'o5>NL:
int temp = data; 6ix8P;;}#
data = data[j]; fOtL6/?
data[j] = temp; u-$(TyDEl|
} vzd1:'^t
} .B+R+2uY3