[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; Mj@2=c
} @R&d<^I&M
int i1=l; 'AA9F$Dz
int i2=mid+1; atyvo0fNd
for(int cur=l;cur<=r;cur++){ 4!dc/K
if(i1==mid+1) XPdmz!,b
data[cur]=temp[i2++]; kqBZsfF
else if(i2>r) U3_${
data[cur]=temp[i1++]; }n^Rcz6HeO
else if(temp[i1] data[cur]=temp[i1++]; $d*9]M4
else 9q'&tU'a=c
data[cur]=temp[i2++]; v#,queGi
} k8D_
} UWT%0t_T
o]1BWwtY&
} a7g;8t-&
$INB_/RE
改进后的归并排序: 9nR\7!_
.!3e$mhV
package org.rut.util.algorithm.support; zsp%Cz7T
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import org.rut.util.algorithm.SortUtil; Sf?;j{?G
Vuz.b.,i`
/** R*r4)+gd
* @author treeroot UF+Qx/4h0
* @since 2006-2-2 2>o[
* @version 1.0 *2h%dT:,%
*/ D?n6h\h\$%
public class ImprovedMergeSort implements SortUtil.Sort { <K0epED
?c#s}IH
private static final int THRESHOLD = 10; -Q20af-
1'&.6{)P
/* Z|t=t"6"
* (non-Javadoc) hU$aZ
* gGrVpOzBj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jrp>Y:
*/ t]HY@@0g
public void sort(int[] data) { w9'>&W8T
int[] temp=new int[data.length]; "<iH8MzZ
mergeSort(data,temp,0,data.length-1); *qzdt^[ xo
} Cx TAd[az
\]>YLyG
private void mergeSort(int[] data, int[] temp, int l, int r) { ~e}JqJ(97
int i, j, k; P)vD?)Q
int mid = (l + r) / 2; N`W[Q>n
if (l == r) kyHli~Nr"
return; Rzd`MIHDp
if ((mid - l) >= THRESHOLD) COw"6czX/
mergeSort(data, temp, l, mid); T8+[R2_
else (4FVemgy
insertSort(data, l, mid - l + 1); PK+sGV
if ((r - mid) > THRESHOLD) YYQvt
mergeSort(data, temp, mid + 1, r); F{x+1hct0
else sa'1hX^@
insertSort(data, mid + 1, r - mid); 'WW:'[Syn'
Sp\TaUzg
for (i = l; i <= mid; i++) { W9?* ~!
temp = data; /S]$Hu|
} Ro<779.Gn\
for (j = 1; j <= r - mid; j++) { \B#tB?rA
temp[r - j + 1] = data[j + mid]; _V"0g=&Hc
} <&\ng^Z$
int a = temp[l]; VlV X
int b = temp[r]; h%EeU 3
for (i = l, j = r, k = l; k <= r; k++) { S70#_{
if (a < b) { [QnN1k
data[k] = temp[i++]; <@Q27oEuA
a = temp; d]0:r]e
} else { m}l);P^
data[k] = temp[j--]; %Xh}{o$G
b = temp[j]; j:%,lcF
} v.]{b8RR
} $5XAS
} Cfi4~&
:|bL2T@>[
/** vm@V5oH
* @param data pB:XNkxL
* @param l E ASnh
* @param i JSB+g;
*/ I~6) Gk&
private void insertSort(int[] data, int start, int len) { CQ2vFg3+o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wa[L[mw
} ,SIS3A>s
} {]\7 M|9\
} wa@Rlzij>
} !Q>xVlPVu
`Wx| 4
堆排序： <N)!s&D
vm! y2
package org.rut.util.algorithm.support; H q6%$!q
UV2W~g
import org.rut.util.algorithm.SortUtil; iDDJJ>F26
sRt7.fe
/** E`j' <#V!
* @author treeroot %2:UsI
* @since 2006-2-2 MnD}i&k[
* @version 1.0 <{W{ Y\_A>
*/ s",Ea*
public class HeapSort implements SortUtil.Sort{ Fn5BWV
%UI^+:C
/* (non-Javadoc) j/aJDE(+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fizW\f8ai
*/ & R_?6*n
public void sort(int[] data) { 9Y3"V3EZ
MaxHeap h=new MaxHeap(); '#c#.O
h.init(data); ?;RY/[IX6
for(int i=0;i h.remove(); |YLja87
System.arraycopy(h.queue,1,data,0,data.length); wS=vm}}u
} fnX[R2KZ
fd4gB6>
private static class MaxHeap{ B :%Vq2`
x{;{fMN1
void init(int[] data){ 5$ik|e^:y
this.queue=new int[data.length+1]; u4hn9**a1
for(int i=0;i queue[++size]=data; bo#xqSGQ
fixUp(size); ir6aV|ea!
} ?q`i MiN
} O[ z0+Q?6Z
&KMI C
private int size=0; Lyc6nP;F
bhD-;Y!6;
private int[] queue; K#k/t"r
-. *E<%
public int get() { CWeQv9h]X
return queue[1]; `i.fm1I]
} W_@ b. 1
@A6iY
public void remove() { h2'6W)
SortUtil.swap(queue,1,size--); bf/6AY7
fixDown(1); J299mgB
} ,Mw93Kp Va
file://fixdown WdOxwsq"
private void fixDown(int k) { (RI)<zaK ;
int j; pT=^o
while ((j = k << 1) <= size) { [.>=>KJ_
if (j < size %26amp;%26amp; queue[j] j++; f2c<-}wR
if (queue[k]>queue[j]) file://不用交换 .QP`Qn6(P
break; M.Q HE2
SortUtil.swap(queue,j,k); v/ Ge+o0K
k = j; hwM<0Jf
} {-I+
} j)/Vtf
private void fixUp(int k) { 2:|vJ<Q
while (k > 1) { BPj?l
int j = k >> 1; ~j[?3E4L}
if (queue[j]>queue[k]) Y[e.1\d'
break; 5 Y&`ZJ
SortUtil.swap(queue,j,k); 9gA@D%0
k = j; V06*qQ[
} f&$Bjq
} ]0'cdC
r??_2>Q
} E"*E[>
>h%>s4W
} U~=?I)Ni
q+[ )i6!?
SortUtil： .=YV
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package org.rut.util.algorithm; @N '_qu
Z4G%Ve[
import org.rut.util.algorithm.support.BubbleSort; 1^^{;R7N
import org.rut.util.algorithm.support.HeapSort; _v#puFy
import org.rut.util.algorithm.support.ImprovedMergeSort; egsP\ '
import org.rut.util.algorithm.support.ImprovedQuickSort; @"s<0T^H
import org.rut.util.algorithm.support.InsertSort; b$;oty9Y
import org.rut.util.algorithm.support.MergeSort; 7Wef[N\x
import org.rut.util.algorithm.support.QuickSort; =ttD5p
import org.rut.util.algorithm.support.SelectionSort; ~ ?nn(Q-
import org.rut.util.algorithm.support.ShellSort; V_ (Ly8"1;
=xkaF)AW&v
/** f-#:3k*7S
* @author treeroot PI L)(%X
* @since 2006-2-2 vFHeGq70j
* @version 1.0 |};d:LwX
*/ #qVvh3#g
public class SortUtil { $`UdG0~
public final static int INSERT = 1; &L0Ii)Ns
public final static int BUBBLE = 2; 28v^j*=* \
public final static int SELECTION = 3; $G <r2lPy
public final static int SHELL = 4; [<i3l'V/[
public final static int QUICK = 5; (@NILK
public final static int IMPROVED_QUICK = 6; waz5+l28
public final static int MERGE = 7; d(}? \|
public final static int IMPROVED_MERGE = 8; 2wO8;wiA
public final static int HEAP = 9; ?IeBo8
t$qIJt$
public static void sort(int[] data) { PJ:!O?KVq
sort(data, IMPROVED_QUICK); j+'ua=T3
} O:I]v@
private static String[] name={ *# <%04f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ib{#dhV
}; 8Mtd}{Fw*
hTO5*5]0zP
private static Sort[] impl=new Sort[]{ m^BXLG:b
new InsertSort(), 5vD\?,f E
new BubbleSort(), h)sT37
new SelectionSort(), RCa1S^.
new ShellSort(), e\(X:T
new QuickSort(), kt`ln
new ImprovedQuickSort(), tWl')^
new MergeSort(), P_jav0j7g
new ImprovedMergeSort(), fph+05.%
new HeapSort() ^+%bh/2_W
}; r[):'ys,C
=M:Po0?0E
public static String toString(int algorithm){ fiC0'4.,
return name[algorithm-1]; LTBH/[q5
} X)(K|[
QpzdlB44l
public static void sort(int[] data, int algorithm) { <gX({FA
impl[algorithm-1].sort(data); A/9<} m
} JkR%o #>5
noaR3)
public static interface Sort { MYV3</Xj*
public void sort(int[] data); 1 39T*0C
} _Cf:\Xs m
nGTGX
public static void swap(int[] data, int i, int j) { Ax|'uvVAPT
int temp = data; I`xC0ZUKj
data = data[j]; [x?9<#T
data[j] = temp; ":e6s co
} '/D2d
} BbFLT@W4