[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; DGR[2C)@N
} 8>U{>]WG
int i1=l; \<cs:C\h7
int i2=mid+1; v[k;R
for(int cur=l;cur<=r;cur++){ ZGILV
if(i1==mid+1) /INjP~C
data[cur]=temp[i2++]; S511}KPbm/
else if(i2>r) K]~! =j)v
data[cur]=temp[i1++]; WJ%4IaT
else if(temp[i1] data[cur]=temp[i1++]; ,]A|z ~q
else 5Q)hl.<{o7
data[cur]=temp[i2++]; <1t.f}}uX
} T0:%,o
} I&2)@Zw
}XOTK^YA
} ~>&Jks_Q
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改进后的归并排序: "!-
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package org.rut.util.algorithm.support; NOC8h\s}(
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import org.rut.util.algorithm.SortUtil; CcGE4BB
sBN"eHg
/** uPe&i5YR
* @author treeroot p(B^](?
* @since 2006-2-2 ,, 8hU7P
* @version 1.0 3shRrCL0mf
*/ }da}vR"iL
public class ImprovedMergeSort implements SortUtil.Sort { Eo\pNz#)
)$EmKOTt:
private static final int THRESHOLD = 10; pr;n~E 'kq
r6JQRSakR
/* H0!LiazA>
* (non-Javadoc) ^bD)Tg5K
* dBWi1vTF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DGc5Lol~
*/ hSl6X3W
public void sort(int[] data) { O V"5:){
int[] temp=new int[data.length]; AVn?86ri
mergeSort(data,temp,0,data.length-1); $Ph T:
} teQ<v[W.
5`_UIYcI
private void mergeSort(int[] data, int[] temp, int l, int r) { ''Pu
int i, j, k; 9$ VudE>;
int mid = (l + r) / 2; TnuaP'xZ
if (l == r) g!QX#_~Il
return; b0(bL_,
if ((mid - l) >= THRESHOLD) `>HM<Nn-0
mergeSort(data, temp, l, mid); @IXvp3r
else "dkDT7
insertSort(data, l, mid - l + 1); /JqNiqvh
if ((r - mid) > THRESHOLD) >'eY/>n{
mergeSort(data, temp, mid + 1, r); j1Ns|oph1
else bjL8Wpk
insertSort(data, mid + 1, r - mid); a)o-6
7>-"r*W +z
for (i = l; i <= mid; i++) { 3rxB]-
temp = data; Th'B5:`
} zfsGf'U
for (j = 1; j <= r - mid; j++) { =qJlSb
temp[r - j + 1] = data[j + mid]; No\3kRB4bi
} KbXENz&C
int a = temp[l]; 4MFdhJoN
int b = temp[r]; IPVD^a?
for (i = l, j = r, k = l; k <= r; k++) { Kggc9^ 7
if (a < b) { _c z$w5`
data[k] = temp[i++]; 9}*Pb6
a = temp; lH%%iYBM
} else { tM:%{az
data[k] = temp[j--]; S5+W<Qs
b = temp[j]; 7hzd.
} c,yjsxETW
} J4) ?hS
} C j4ED
:aO`q/d
/** +|w%}/N
* @param data m=4hi(g
* @param l LBIsj}e
* @param i ^~7/hm:
*/ j^T i6F>f
private void insertSort(int[] data, int start, int len) { r%uka5@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #5%\~f
} FJ+n- \
} VF bso3q<j
} 2(i@\dZCb<
} h,fC-+H5
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堆排序： mS9ITe M
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package org.rut.util.algorithm.support; #dj,=^1_14
d69synEw>k
import org.rut.util.algorithm.SortUtil; W#bOx0
N51e.;
/** xf7_|l
* @author treeroot nB9(y4
* @since 2006-2-2 FoX,({*Ko~
* @version 1.0 AxAbU7m
*/ %E"dha JY
public class HeapSort implements SortUtil.Sort{ PR2;+i3
/cX%XZg
/* (non-Javadoc) NY3/mS3w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bH Nf>
*/ 5OM*NT t
public void sort(int[] data) { '89nyx&W
MaxHeap h=new MaxHeap(); Gl6M(<f\5
h.init(data); VBN=xg}
for(int i=0;i h.remove(); <hBd #J
System.arraycopy(h.queue,1,data,0,data.length); dcH@$D@~S
} ^Z>Nbzr{
{3qlx1w
private static class MaxHeap{ -}CMNh
K[^BRn
void init(int[] data){ [Te"|K':
this.queue=new int[data.length+1]; `L m9!?
for(int i=0;i queue[++size]=data; .jv#<"DW
fixUp(size); ?m\? #
} K9tr Iy$v
} VUUE2k;^
o^3X5})sv
private int size=0; v/GZByco>
iOdk)
private int[] queue; "KKw\i
O"ebrv
public int get() { >|rU*+I`
return queue[1]; V'8Rz#Gc5
} 7m.>2U
3{{Ew}kZm
public void remove() { G0lg5iA<fC
SortUtil.swap(queue,1,size--); r E&}B5PN=
fixDown(1); 2o<aEn&7|e
} Xk9 8%gv
file://fixdown 'pHxO,vo
private void fixDown(int k) { y4N2gBTKu
int j; il[waUfmD
while ((j = k << 1) <= size) { `6\u!#
if (j < size %26amp;%26amp; queue[j] j++; /2x@Z>
if (queue[k]>queue[j]) file://不用交换 NI85|*h
break; :I(d-,C
SortUtil.swap(queue,j,k); t8f:?
k = j; >9Z7l63+}
} zI$'D|A
} YZZog6%
private void fixUp(int k) { jL0=a.;
while (k > 1) { eZ|_wB'r
int j = k >> 1; lQqP4-E?
if (queue[j]>queue[k]) 5I&Dk4v
break; *:Uq ;)*
SortUtil.swap(queue,j,k); 4G'-"u^g
k = j; z#GrwE,r
} =h\uC).t&
} mCSt.n~
FnCMr_
} \ch4c9
dYZB> OS
} i}/Het+(
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SortUtil： ddwokXx (
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package org.rut.util.algorithm; |e91KmiqJ
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import org.rut.util.algorithm.support.BubbleSort; +ctJV>
import org.rut.util.algorithm.support.HeapSort; w,-4A o2x
import org.rut.util.algorithm.support.ImprovedMergeSort; Sr>5V
import org.rut.util.algorithm.support.ImprovedQuickSort; qZ%0p*P#_
import org.rut.util.algorithm.support.InsertSort; yJ*g ;
import org.rut.util.algorithm.support.MergeSort; m1DrT>oN'
import org.rut.util.algorithm.support.QuickSort; i?D)XXB85
import org.rut.util.algorithm.support.SelectionSort; |w.h97fj
import org.rut.util.algorithm.support.ShellSort; l}~9xa}:D|
42=/$V
/** oC}2 Z{
* @author treeroot L}VQc9"gc
* @since 2006-2-2 ^+O97<#6C
* @version 1.0 B=HEi\55K
*/ A2''v3-h8
public class SortUtil { 59H~qE1Md
public final static int INSERT = 1; &F.L*M
public final static int BUBBLE = 2; oA+'9/UY
public final static int SELECTION = 3; KidbcZ
public final static int SHELL = 4; 6E$ET5p&l
public final static int QUICK = 5; &sooXKlv|
public final static int IMPROVED_QUICK = 6; 0QY9vuhL<
public final static int MERGE = 7; Ga\kvMtr
public final static int IMPROVED_MERGE = 8; v+W4wD
public final static int HEAP = 9; sMcN[r
wPvYnhr|G-
public static void sort(int[] data) { `S|T&|ad0
sort(data, IMPROVED_QUICK); xTy)qN]P
} `8kL=%(h
private static String[] name={ W?gelu]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lz4M)pL^
}; #ds@!u+&
7 b8pWM
private static Sort[] impl=new Sort[]{ M%2w[<-8c
new InsertSort(), co*XW
new BubbleSort(), j/uzsu+
new SelectionSort(), a*qc
new ShellSort(), 87rHW@\](
new QuickSort(), |XJ|vQGU
new ImprovedQuickSort(), 2XrYm"6w
new MergeSort(), a"8H(HAlNn
new ImprovedMergeSort(), d5'4RYfkQ
new HeapSort() Go !{T
}; cHon' tS
.[o`TlG%
public static String toString(int algorithm){ ~b})=7n.
return name[algorithm-1]; Hm]\.ZEy
} )PvB^n
DI=?{A
public static void sort(int[] data, int algorithm) { gp4@6HuUd
impl[algorithm-1].sort(data); YXIAVSnr
} 6*s:I&
[#2X
public static interface Sort { c\VD8 :
public void sort(int[] data); _f@nUv*
} ddEV@2F
<+: PTG/('
public static void swap(int[] data, int i, int j) { LzD,]{CC5
int temp = data; Sz>Lbs
data = data[j]; i}v3MO\X
data[j] = temp; !Aw.)<teW
} {YEGy
} \Z_29L w=