[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; gV$Lfkz
} qwiM.b5
int i1=l; )xT_RBR
int i2=mid+1; gMFTZQsP
for(int cur=l;cur<=r;cur++){ mVP@c&1w?
if(i1==mid+1) E.}T.St
data[cur]=temp[i2++]; 6*tI~
else if(i2>r) \62|w HX
data[cur]=temp[i1++]; OI::0KOv
else if(temp[i1] data[cur]=temp[i1++]; Q~te`
else uRxo,.}c
data[cur]=temp[i2++]; ,.x1+9X
} : -te
} CP["N(fF
A ElNf:
} .y#@~H($
!pQQkZol
改进后的归并排序: ppmDmi~X
6]CY[qEaR$
package org.rut.util.algorithm.support; %h2U(=/:
1g^N7YF
import org.rut.util.algorithm.SortUtil; 87r#;ND
nhiCV>@y
/** G\ru%
* @author treeroot X3<<f`X
* @since 2006-2-2 dl;^sn0s
* @version 1.0 G%Wjtrpj
*/ OqHD=D[
public class ImprovedMergeSort implements SortUtil.Sort { {6 C!^ 5
_LCK|H%v'
private static final int THRESHOLD = 10; BQ2DQ7q
-jFvDf,M,D
/* }9:d(B9;
* (non-Javadoc) G# .z((Rj
* m80QMosp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u\<z5O
*/ l"*zr ;#
public void sort(int[] data) { tg7%@SI5^-
int[] temp=new int[data.length]; HT[<~c
mergeSort(data,temp,0,data.length-1); yAW%y
} <x53b/ft
3l-8TR
private void mergeSort(int[] data, int[] temp, int l, int r) { sJw#^l
int i, j, k; CM!bD\5
int mid = (l + r) / 2; ~%bz2Pd%
if (l == r) gY=nU,;
return; Fnzv&
if ((mid - l) >= THRESHOLD) ,_F1g<^@u
mergeSort(data, temp, l, mid); -'*B%yy
else d+\o>x|Y!Y
insertSort(data, l, mid - l + 1); jLM1~`&
if ((r - mid) > THRESHOLD) X8GIRL)lJ
mergeSort(data, temp, mid + 1, r); )8!""n~
else J XPE9uH
insertSort(data, mid + 1, r - mid); Nw/4z$].J
=NQDxt}
for (i = l; i <= mid; i++) { @9~6+BZOq
temp = data; zw_Xh~4"b
} UQ}[2x(Kb
for (j = 1; j <= r - mid; j++) { eYOwdTrq
temp[r - j + 1] = data[j + mid]; +j%!RS$ko
} )4bBR@QM
int a = temp[l]; s%1O}X$c
int b = temp[r]; qm{(.b^
for (i = l, j = r, k = l; k <= r; k++) { ^"(CZvq
if (a < b) { +>M^p2l*&
data[k] = temp[i++]; |'aGj
a = temp; ~*79rDs{
} else { v1oq[+
data[k] = temp[j--]; si.ZTG9m
b = temp[j]; AD_")_B|i
} zN:VT&
} bzF>Efza
} -B*= V
8Mf6*G#Y
/** @4#q
* @param data 0r*E$|zZ
* @param l .hzzoLI2
* @param i zn@<>o8hU
*/ 04D>h0yFf
private void insertSort(int[] data, int start, int len) { #.'0DWT\-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !D!~4h)
} wqkD
} I}q2)@
} @@-n/9>vs
} jAie[5
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堆排序： iVTC"v
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package org.rut.util.algorithm.support; Ub2t7MU
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import org.rut.util.algorithm.SortUtil; 3CL/9C>
C& BRyo
/** Ye% e!
* @author treeroot WYSqnmi
* @since 2006-2-2 opU=49b
* @version 1.0 Ti$G2dBO
*/ WK)hj{k
public class HeapSort implements SortUtil.Sort{ PV$)k>H-
't.IYBHx
/* (non-Javadoc) n?!XNXb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S81%iz.n
*/ BZ*',\o
public void sort(int[] data) { }Go?j# !
MaxHeap h=new MaxHeap(); d,8L-pT$FM
h.init(data); ZP~Mgz{f
for(int i=0;i h.remove(); b"Hc==`
System.arraycopy(h.queue,1,data,0,data.length); u1a0w
} I!eu|_cF
IO3p&sJ/
private static class MaxHeap{ U*(/eEtd-
>HNBTc=~t
void init(int[] data){ Ne#FBRu5
this.queue=new int[data.length+1]; kl%%b"h'
for(int i=0;i queue[++size]=data; M15Ce)oB1(
fixUp(size); >cU#($X$^
} nWb*u
} @6h,#8#
@+Yql
private int size=0; SQ'\Kd=
>M~1{
private int[] queue; )Q= EmZbJz
[$M=+YRHMW
public int get() { K)b@,/5
return queue[1]; K</EVt,U~
} #NQpr
]8@s+N
public void remove() { &n$kVNE
SortUtil.swap(queue,1,size--); Iue}AGxu:{
fixDown(1); nilis-Bk_
} I]Ev6>=;
file://fixdown ]Q0m]OaT
private void fixDown(int k) { ~&HP}Q$#f
int j; ^/]w}C#:d
while ((j = k << 1) <= size) { M^IEu}
if (j < size %26amp;%26amp; queue[j] j++; ?#s9@R1
if (queue[k]>queue[j]) file://不用交换 -&q@|h'
break; &pHSX
SortUtil.swap(queue,j,k); qlSI|@CO
k = j; =jv3O.zq
} #dA9v7
} !]f80z
private void fixUp(int k) { 7[=\bL
while (k > 1) { BOt1J_;(rO
int j = k >> 1; `vjn,2S}
if (queue[j]>queue[k]) )qSjI_qt5
break; ]31>0yj[Q
SortUtil.swap(queue,j,k); 4.Kl/b;
k = j; 9*~bAgkWI
} I]GGmN
} !0-KB#
E'-lpE
} Ic2Q<V}oq
/cHUqn30a
} \k4tYL5
JuW"4R
SortUtil： Gh%R4)}
u,RR|/@
package org.rut.util.algorithm; 5 w-Pq&q
$8>kk
import org.rut.util.algorithm.support.BubbleSort; hgg8r#4q
import org.rut.util.algorithm.support.HeapSort; OQ(w]G0LP
import org.rut.util.algorithm.support.ImprovedMergeSort; { 9:vq|
import org.rut.util.algorithm.support.ImprovedQuickSort; |$|B0mj
import org.rut.util.algorithm.support.InsertSort; Es<& 6
import org.rut.util.algorithm.support.MergeSort; ;*%3J$T+
import org.rut.util.algorithm.support.QuickSort; eI,'7u4q
import org.rut.util.algorithm.support.SelectionSort; srlxp_^
import org.rut.util.algorithm.support.ShellSort; >Nam@,hm
ZLDO&}
/** "DO|B=EejP
* @author treeroot |N5r_V
* @since 2006-2-2 $^:s)Yv
* @version 1.0 dNu?O>=
*/ joz0D!-"#
public class SortUtil { ^F)t>K$0m
public final static int INSERT = 1; Mz7qC3Z
public final static int BUBBLE = 2; %$Dn);6=
public final static int SELECTION = 3; VLPPEV-u
public final static int SHELL = 4; 2Tp@;[!3
public final static int QUICK = 5; !zVjbYWY
public final static int IMPROVED_QUICK = 6; o75l&`
public final static int MERGE = 7; _V`F_C\\#
public final static int IMPROVED_MERGE = 8; E"%dO
public final static int HEAP = 9; |LV}kG(2
*I:a\o~$[
public static void sort(int[] data) { )\KU:_l
sort(data, IMPROVED_QUICK); |.*nq
} GIb,y,PDB
private static String[] name={ ARUzEo gcf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e0<Wed
}; u>ZH-nw O
FMX^k
private static Sort[] impl=new Sort[]{ ,ZI#p6
new InsertSort(), A$g'/QM
new BubbleSort(), j/t)=c
new SelectionSort(), T mK[^
new ShellSort(), K 0e*K=UM
new QuickSort(), 3xk-D &"
new ImprovedQuickSort(), Spu> ac
new MergeSort(), s6F0&L;N&
new ImprovedMergeSort(), M3U?\g
new HeapSort() 5BJn_<
}; H Y~[/H+:
-zg 6^f_pW
public static String toString(int algorithm){ ."Kp6s`k
return name[algorithm-1]; gy1R.SN
} 9Y:Iha`$w
L\hid/NL
public static void sort(int[] data, int algorithm) { {SF'YbY
impl[algorithm-1].sort(data); 0.\}D:x(z
} x)jc
?8qN8rk^+
public static interface Sort { %Rt 5$+dNT
public void sort(int[] data); Nwj M=GG
} u4tv=+jh
EK.n $
public static void swap(int[] data, int i, int j) { EfB.K}b^
int temp = data; !hFzIp
data = data[j]; uZTbJ3$$
data[j] = temp; 2KlVj]!7
} &^`[$LtYd
} shD4";8*@