[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; UF5_be,D
} ?r&~(<^z
int i1=l; r5hkxk'
int i2=mid+1; DeF`#a0E
for(int cur=l;cur<=r;cur++){ I F!xZ6X8
if(i1==mid+1) T|S-?X,
data[cur]=temp[i2++]; ;ZI8vFb
else if(i2>r) |z_Dw$-xm
data[cur]=temp[i1++]; 5cQ]vb
else if(temp[i1] data[cur]=temp[i1++]; jmv=rl>E*
else 4+d(d
data[cur]=temp[i2++]; @aUNyyVP
} )hO%W|
} k}<H
l}^ziY!
} =#9#unvE!
,.*Df)+
改进后的归并排序: yY UAH-
fmv:vs /9
package org.rut.util.algorithm.support; ]$s)6)kW
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import org.rut.util.algorithm.SortUtil; |-\anby<
DPW^OgL;
/** Lc}hjK
* @author treeroot L7rr/D
* @since 2006-2-2 ,D`jlY-1l
* @version 1.0 [T7&)p
*/ &4WA/'>R
public class ImprovedMergeSort implements SortUtil.Sort { }15&<s
~$4(|Fq/
private static final int THRESHOLD = 10; jA:'P~`Hj
P(8Yz W
/* ;7qzQ{Km
* (non-Javadoc) 6vNn;-gg.
* %4x0^<k~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _$IWr)8f
*/ zB+e;x f|
public void sort(int[] data) { C,>n
int[] temp=new int[data.length]; oupWzjo
mergeSort(data,temp,0,data.length-1); yxpv;v:)=
} ceks~[rP
~1*37w~
private void mergeSort(int[] data, int[] temp, int l, int r) { |*zgX]-+;
int i, j, k; HX| p4-L
int mid = (l + r) / 2; R-ek O7z
if (l == r) )^qXjF
return; P6>C+T1
if ((mid - l) >= THRESHOLD) qlPIxd
mergeSort(data, temp, l, mid); cL4Go,)w
else S m=ln)G=
insertSort(data, l, mid - l + 1); \^y~w~g?
if ((r - mid) > THRESHOLD) AG vhSd7
mergeSort(data, temp, mid + 1, r); v:74iB$i/C
else RLQ*&[A}
insertSort(data, mid + 1, r - mid); s1Wn.OGR4
6 A]a@,PC
for (i = l; i <= mid; i++) { 3*%+NQIj
temp = data; RfvvX$
} #X*);cn
for (j = 1; j <= r - mid; j++) { Px?"5g#+
temp[r - j + 1] = data[j + mid]; 1nvT={'R
} [Pp#r&4H
int a = temp[l]; 8irTGA
int b = temp[r]; +[n#{;]<
for (i = l, j = r, k = l; k <= r; k++) { v.:Q& ]
if (a < b) { `/R. 5;$|
data[k] = temp[i++]; z$m(@Q
a = temp; w0$+v/
} else { Gb[J3:.
data[k] = temp[j--]; Wy6a4oY
b = temp[j]; 4`oKvL9
} =(TMcu$4`
} ckP AH E@
} .HY,'oC.
It/'R-H
/** 7W4m&+
* @param data $;ny`^8
* @param l |p*cI @
* @param i X_Lt{mf
*/ d<OdQvW.
private void insertSort(int[] data, int start, int len) { =$#5Ge]b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aG =6(ec.
} "Zn nb*pOM
} h|'|n/F
} 45%D^~2~F
} M"K$.m@t
Xu#?Lw
堆排序： /03Wst
P>~Usuf4
package org.rut.util.algorithm.support; @Bkg<
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import org.rut.util.algorithm.SortUtil; T&S=/cRBK}
^e]O >CJ
/** e9:pS WA-n
* @author treeroot Q8l vwip
* @since 2006-2-2 gxI/MD~!>
* @version 1.0 ?@MY+r_G
*/ tJtp1$h
public class HeapSort implements SortUtil.Sort{ &l-d_dh
HtE^7i*_
/* (non-Javadoc) 438r]f?0|{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DrBkR`a?
*/ ]1GyEr:
public void sort(int[] data) { 9$[MM*r
MaxHeap h=new MaxHeap(); xo ^|d3
h.init(data); d,meKQn
for(int i=0;i h.remove(); rWO#h{
System.arraycopy(h.queue,1,data,0,data.length); gV:0&g\v
} x=W s)&H_Y
Ik5-ooZ&{
private static class MaxHeap{ Xooh00
Z5wQhhH
void init(int[] data){ ~pI`_3
this.queue=new int[data.length+1]; wLO"[,
for(int i=0;i queue[++size]=data; D"fjk1
fixUp(size); k{Y\YG%b
} $OGMw+$C^
} w*@9:+
n@C#,v#^0
private int size=0; 1UrkDz?X
91a);d
private int[] queue; f<<$!]\
p ~+sk1[.
public int get() { l% %cU"
return queue[1]; 7:$dl#
} Ew{N2
trLxg H_Y
public void remove() { }VH2G94Ll
SortUtil.swap(queue,1,size--); w+\RSqz/
fixDown(1); R[vX+d!7
} v=uQ8_0~N
file://fixdown X^m@*,[s
private void fixDown(int k) { V0#E7u`4
int j; L5&,sJz
while ((j = k << 1) <= size) { FO]f 4@
if (j < size %26amp;%26amp; queue[j] j++; .OW5R*
if (queue[k]>queue[j]) file://不用交换 %.uN|o&n
break; 1T,Bd!g
SortUtil.swap(queue,j,k); %>O}bdSf
k = j; Xpkj44cd@
} >A6PH*x
} bgInIe
private void fixUp(int k) { Ia^/^>
while (k > 1) { )J[Ady^5
int j = k >> 1; .'-t>(}v
if (queue[j]>queue[k]) [a^<2V!vMn
break; 1&=2"
SortUtil.swap(queue,j,k); rX`fjS*C
k = j; P=9sP:[f6
} F*:H&,
} DAMw(
geqx":gpx9
} `I|Y7GoUO
cIuCuh0I`
} pFo,@M
dftX$TS
SortUtil： `\BBdQ#bH
{+9t!'
package org.rut.util.algorithm; "JYWsE
:}v:=ck
import org.rut.util.algorithm.support.BubbleSort; c Ct5m
import org.rut.util.algorithm.support.HeapSort; "(+aWvb
import org.rut.util.algorithm.support.ImprovedMergeSort; GsqO^SV
import org.rut.util.algorithm.support.ImprovedQuickSort; $VxuaOTyVZ
import org.rut.util.algorithm.support.InsertSort; ]HG>Og
import org.rut.util.algorithm.support.MergeSort; MAc/ T.[
import org.rut.util.algorithm.support.QuickSort; ~~ty9;KYL
import org.rut.util.algorithm.support.SelectionSort; ^M1O)
import org.rut.util.algorithm.support.ShellSort; 8Tc:TaL
f+c{<fX
/** L#_QrR6Sny
* @author treeroot <%`z:G3
* @since 2006-2-2 P[Vf$ q<
* @version 1.0 `-rtU
*/ H[r64~Sth
public class SortUtil { $T2zs$
public final static int INSERT = 1; 1<M~#
public final static int BUBBLE = 2; 6HVGqx
public final static int SELECTION = 3; z7*mT}Q
public final static int SHELL = 4; \]L ha
public final static int QUICK = 5; ,#.^2O9-^
public final static int IMPROVED_QUICK = 6; 3ZYrNul"
public final static int MERGE = 7; rV I-Yb
public final static int IMPROVED_MERGE = 8; `zcpaE.@
public final static int HEAP = 9; :\1vy5 _
W5RZsS]
public static void sort(int[] data) { -dUXd<=ue
sort(data, IMPROVED_QUICK); }-WuHh#
} &G+:t)|S
private static String[] name={ \FyHIs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3\P/4GK)
}; ~^eC?F(
fhQ N;7
private static Sort[] impl=new Sort[]{ -]MZP:s
new InsertSort(), O<0-`=W,a
new BubbleSort(), 8O^z{Yh7
new SelectionSort(), 7q^a@5f BG
new ShellSort(), xSjs+Y;Mu
new QuickSort(), sQY0Xys<4
new ImprovedQuickSort(), c5HW.3"
new MergeSort(), 4wwRNu*
new ImprovedMergeSort(), ?vP}#N!=d
new HeapSort() e(-Vp7vXG
}; 4f,%@s)zn
}e,*'mCC*
public static String toString(int algorithm){ 9kU|?JE
return name[algorithm-1]; js=w!q0)9
} ns8I_H
rP&.`m88n
public static void sort(int[] data, int algorithm) { N5fMMi(O
impl[algorithm-1].sort(data); oVnHbvP1X
} d[KG0E5`
[i N}W5 m
public static interface Sort { _5768G`P
public void sort(int[] data); `"E<%$|ZQy
} }Q>??~mVl
x$V[xX
public static void swap(int[] data, int i, int j) { /57)y_ \
int temp = data; lem\P_V)
data = data[j]; xV5eKV
data[j] = temp; @1 )][r-7
} :U#4H;kk~j
} EXbhyg