[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; A_i=hj2f
} Q9Sh2qF^2
int i1=l; XShi[7
int i2=mid+1; & =)HPzC
for(int cur=l;cur<=r;cur++){ ]QlgVw,
if(i1==mid+1) hxZ5EKBy
data[cur]=temp[i2++]; B<%cqz@
else if(i2>r) 0Q`Dp;a5&
data[cur]=temp[i1++]; *c3(,Bmw
else if(temp[i1] data[cur]=temp[i1++]; NO+.n)etGb
else 0}$Zr*|;Y
data[cur]=temp[i2++]; }>]V_}h
} #ueWU
} \,&,Q
g(& huS
} '"qTmo!
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改进后的归并排序: :#7"SEud}
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package org.rut.util.algorithm.support; <n? cRk'.
lJb1{\|.,
import org.rut.util.algorithm.SortUtil; ;UUpkOQO(
3Xcjr2]~
/** 1cq"H/N
* @author treeroot `1 A,sXfa
* @since 2006-2-2 >}?jOB
* @version 1.0 5nF46c
*/ +Np[m$Z*
public class ImprovedMergeSort implements SortUtil.Sort { MkLXMwuQ&
kD;1+lNz
private static final int THRESHOLD = 10; wIQ~a
_@2}zT
/* !>RDHu2n
* (non-Javadoc) 71b0MHNkvv
* E.LD1Pm0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aG_@--=
*/ M$YU_RPl+
public void sort(int[] data) { Zaime
int[] temp=new int[data.length]; ,=>Ws:j
mergeSort(data,temp,0,data.length-1); RRRF/Z;))
} !B|Aq- n,
&X3G;x2;
private void mergeSort(int[] data, int[] temp, int l, int r) { p+7G
int i, j, k; ;z2\ Q$
int mid = (l + r) / 2; ?qC6p|H
if (l == r) vbBNXy/
return; ahICx{hK
if ((mid - l) >= THRESHOLD) ^#( B4l!
mergeSort(data, temp, l, mid); ty ESDp%
else u:]c
insertSort(data, l, mid - l + 1); (;!92ct[?
if ((r - mid) > THRESHOLD) {'#1do}{
mergeSort(data, temp, mid + 1, r); B_Ul&V
else H2kib4^i
insertSort(data, mid + 1, r - mid); z][hlDv\j
2JdzeJb
for (i = l; i <= mid; i++) { S@Iza9\|@
temp = data; A>\5fO
} 4t 5i9+h
for (j = 1; j <= r - mid; j++) { |VX )S!
temp[r - j + 1] = data[j + mid]; p~'iK4[&6
} >V%lA3
int a = temp[l]; 6;:z?Q
int b = temp[r]; \1Xr4H u
for (i = l, j = r, k = l; k <= r; k++) { Yyxsj9
if (a < b) { Xfc+0$U@
data[k] = temp[i++]; Y-?0!a=e.
a = temp; |E?PQ?P
} else { r=Tz++!
data[k] = temp[j--]; \+)aYP2Hu
b = temp[j]; "_^vQ1M]Z
} _^/k
} 9\'JtZO
} `' .;U=mF
HVdy!J
/** CP'b,}Dd?I
* @param data 'kOkwGf!
* @param l *"nN To
* @param i '\O[j*h^.
*/ "hmLe(jo}
private void insertSort(int[] data, int start, int len) { HKL/D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'Z*`~,Q
} 4aP 96
} $fCKK&Wy
} LD*XNcE
} /8#e < p
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堆排序： [I?[N.v
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package org.rut.util.algorithm.support; U)[LKO1
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import org.rut.util.algorithm.SortUtil; -aq3Lqi
?6Wv["%
/** q4ttmL8
* @author treeroot R-Ys<;
* @since 2006-2-2 Q7.jSL6
* @version 1.0 \ 5.nr*5
*/ )n6,uTlOw
public class HeapSort implements SortUtil.Sort{ u`CHM:<<?
(#?O3z1@"
/* (non-Javadoc) a<0q%Ax
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oq^t[X'
*/ Z9G4in8
public void sort(int[] data) { G|oO
MaxHeap h=new MaxHeap(); G} f9:G
h.init(data); O3V.4tp
for(int i=0;i h.remove(); ZO!h!2*
System.arraycopy(h.queue,1,data,0,data.length); (%c&Km7K
} gR+P!Eow
4bCA"QM[[
private static class MaxHeap{ 4_D *xW
)&DsRA7v
void init(int[] data){ {,!!jeOO
this.queue=new int[data.length+1]; -{}(U
for(int i=0;i queue[++size]=data; v#lrF\G5
fixUp(size); ZZw2m@T>
} ~:L5Ar<
} ?W_8X2(`
R;w$_1
private int size=0; !1ZItJ74#
^7uXpqQBr
private int[] queue; Jkv!]C
OMW]9E
public int get() { 2$o#b.
return queue[1]; &q&~&j'[
} [+d~He
4{Q$^wD+.
public void remove() { W__Y^\~
SortUtil.swap(queue,1,size--); 7'OR;b$
fixDown(1); * V7bALY
} ^&\pY
file://fixdown qnHjwMi
private void fixDown(int k) { ]- 6q`'?[
int j; %"cOX
while ((j = k << 1) <= size) { k')H5h+Q=
if (j < size %26amp;%26amp; queue[j] j++; [,MaAB
if (queue[k]>queue[j]) file://不用交换 L8q#_k
break; RH{+8?0
SortUtil.swap(queue,j,k); p$G3<Z&7
k = j; H<}|n1w<
} ?H!jKX
} Nd]RbX
private void fixUp(int k) { )Z/$;7]#
while (k > 1) { <"K2t Tg.
int j = k >> 1; n=)LB& m
if (queue[j]>queue[k]) S|xwYaoy%
break; M@l|n
SortUtil.swap(queue,j,k); dDSb1TM
k = j; }.(DQwC}1k
} z;?ztpa@
} CDF;cM"td
,{\Ae"{6
} o~9sO=-O
_X
} .Tm.M7
rg;4INs#
SortUtil： 8bQXC+bK
[m4M#Lg\0
package org.rut.util.algorithm; ~+d{:WY
;jaugKf
import org.rut.util.algorithm.support.BubbleSort; [NJ2rQ/w7
import org.rut.util.algorithm.support.HeapSort; IhBQ1,&J
import org.rut.util.algorithm.support.ImprovedMergeSort; sPb}A$'
import org.rut.util.algorithm.support.ImprovedQuickSort; RX%)@e/@
import org.rut.util.algorithm.support.InsertSort; nGwon8&]]
import org.rut.util.algorithm.support.MergeSort; U.V/JbXX
import org.rut.util.algorithm.support.QuickSort; 3#x1(+c6
import org.rut.util.algorithm.support.SelectionSort; m]*a;a'}#
import org.rut.util.algorithm.support.ShellSort; ?hAO-*);
-+u}u=z%
/** =>lX brJ
* @author treeroot ; wxmSX9
* @since 2006-2-2 |'&$VzA
* @version 1.0 =fH5r_n
*/ BeLqk3'/
public class SortUtil { +)bn}L>Rl
public final static int INSERT = 1; 3.Yg3&"Z
public final static int BUBBLE = 2; ZXL'R|?
public final static int SELECTION = 3; ]'7Au]Us`
public final static int SHELL = 4; ~ES%=if~Y
public final static int QUICK = 5; AbhR*
public final static int IMPROVED_QUICK = 6; {qlcTc
public final static int MERGE = 7; }ng?Ar[
public final static int IMPROVED_MERGE = 8; 4!OGNr$V@
public final static int HEAP = 9; (,t[`z
~QlF(@ue
public static void sort(int[] data) { #AP;GoIf"j
sort(data, IMPROVED_QUICK); Z m%,L$F*L
} $=,pQ q
private static String[] name={ vE8BB$D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %~k>$(u6
}; tl{{Vc[
>itNa.K
private static Sort[] impl=new Sort[]{ ;~L,Aqn7
new InsertSort(), 5073Q~
new BubbleSort(), 6$:Q]zR#'H
new SelectionSort(), DAiS|x
new ShellSort(), <,0/BMz
new QuickSort(), v&(=^A\eN
new ImprovedQuickSort(), pZK 1G
new MergeSort(), [B`4I
new ImprovedMergeSort(), ]cv|dc=
new HeapSort() B6;>V`!
}; d(XOZF
_&\'Va$
public static String toString(int algorithm){ QcX\z\'vg
return name[algorithm-1]; s3m\
} |c8\alw
+c!HXX
public static void sort(int[] data, int algorithm) { SPRTJdaC9
impl[algorithm-1].sort(data); LC##em=Y
} F!g1.49""
rNJU & .]
public static interface Sort { o~e_M-
public void sort(int[] data); ]T|$nwQ
} fMUh\u3
#"~\/sb
public static void swap(int[] data, int i, int j) { $Zo|ta^
int temp = data; ;]0d{
data = data[j]; pnE]B0e
data[j] = temp; M;b3- i
} JFO,Q -y\
} 1fsNQ!vQP