[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; )?`G"(y
} Y#e,NN
int i1=l; LH}]& >F
int i2=mid+1; M02U,!di
for(int cur=l;cur<=r;cur++){ Q Ev7k
if(i1==mid+1) tuK2D,6
data[cur]=temp[i2++]; jD}G9=[$1
else if(i2>r) SG$V%z"e
data[cur]=temp[i1++]; m3T=x =
else if(temp[i1] data[cur]=temp[i1++]; 2WO5Af%
else c'|](vOd]
data[cur]=temp[i2++]; 5aZbNV}-
} N 2XL5<
} TXL!5, X_
m&MAA^I
} jouA ]E
&&PXWR!%]
改进后的归并排序: -v %n@8p
j+"w2
package org.rut.util.algorithm.support; WUBI(g\
:+ZLKm
import org.rut.util.algorithm.SortUtil; ~a$h\F'6
{,+{,Ere
/** 8sus$:Ry
* @author treeroot C))x#P36
* @since 2006-2-2 ;_X2E~i[
* @version 1.0 ;cEoc(<?
*/ TJ_Wze-lQ
public class ImprovedMergeSort implements SortUtil.Sort { gpw,bV
OLS/3c z
private static final int THRESHOLD = 10; )L/0X40<.
;kDUQw
/* &J?:wC=E
* (non-Javadoc) 2A=q{7s
* ]?G|:Kx$y%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r'(*#
*/ kqkTz_r|H
public void sort(int[] data) { Gf=3h4
int[] temp=new int[data.length]; 3\}>nE
mergeSort(data,temp,0,data.length-1); }]i.z:7+
} FG!2h&k
jd`h)4
private void mergeSort(int[] data, int[] temp, int l, int r) { vnN0o5
int i, j, k; [KL-T16
int mid = (l + r) / 2; QHXA?nBX
if (l == r) baoyU#X9
return; +)hxYLk&I
if ((mid - l) >= THRESHOLD) +OI<0
mergeSort(data, temp, l, mid); xp?YM35
else ^c<8|lK L@
insertSort(data, l, mid - l + 1); {E[t(Ig
if ((r - mid) > THRESHOLD) ,njlKkFw^Z
mergeSort(data, temp, mid + 1, r); \,xa_zeO
else a]/KJn/B(
insertSort(data, mid + 1, r - mid); P$x9Z3d_
'NMO>[.
for (i = l; i <= mid; i++) { O9P+S|hcY
temp = data; b:5-0uxjs
} @>,GCuPrm
for (j = 1; j <= r - mid; j++) { _\8jnpT:
temp[r - j + 1] = data[j + mid]; fK^W6)uuV
} esiU._:u
int a = temp[l]; D0Mxl?S?
int b = temp[r]; uBK0+FLL@
for (i = l, j = r, k = l; k <= r; k++) { ]Twyj
if (a < b) { f(G1xw]]@Y
data[k] = temp[i++]; k!ID
a = temp; oJZxRm[g$t
} else { uPq@6,+
data[k] = temp[j--]; to'CuPkT
b = temp[j]; $1$0M
} M1]}yTCd
} R< L =&I
} w4fQ~rcUIc
?[uHRBR'
/** r+d+gO.
* @param data g>@a
* @param l bg!(B<!X
* @param i dF[|9%)
*/ hF{gN3v5
private void insertSort(int[] data, int start, int len) { d>?C?F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9Fy'L#%
} HSWki';G
} {+m8^-T
} ,CI-IR2
} 1>uAVPa
-g."{|
堆排序： 2F+"v?n=\
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package org.rut.util.algorithm.support; GM8Q#vc
8_E(.]U
import org.rut.util.algorithm.SortUtil; twu,yC!
@ x .`z
/** ;Xf1BG r
* @author treeroot $KQ q~|
* @since 2006-2-2 YKz#,
* @version 1.0 9%Tqk"x?
*/ )Q62I\
public class HeapSort implements SortUtil.Sort{ BT&R:_:
gxhdxSm=2
/* (non-Javadoc) +HPcvu?1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R`Fgne$4
*/ Ph%{h"
public void sort(int[] data) { *;)O'|
MaxHeap h=new MaxHeap(); 3"zPG~fY{
h.init(data); 2{.g7bO
for(int i=0;i h.remove(); Yj'9|4%+|
System.arraycopy(h.queue,1,data,0,data.length); 2WDe34
} zrqI^i"c
H[nco#
private static class MaxHeap{ z{|0W!nHJ
g^Hf^%3xP
void init(int[] data){ qTK(sW
this.queue=new int[data.length+1]; %W8iC%~
for(int i=0;i queue[++size]=data; /7])]vZ_
fixUp(size); Ka6u*:/
} L}CU"
} 8{=|<
OPzudO
private int size=0; Q=8YAiCu
bf@g*~h@
private int[] queue; Z1jxu;O(
f=k#o2
public int get() { IA<>+NS
return queue[1]; vQ*RrHG?c
} xVw@pR;
]\KVA)\
public void remove() { ^8EW/$k
SortUtil.swap(queue,1,size--); xxyc^\$
fixDown(1); `u}_O(A1pA
} mZ2CGOR
file://fixdown :{N*Z}]
private void fixDown(int k) { U#cGd\b
int j; 'iF%mnJ
while ((j = k << 1) <= size) { [Q{\Ik
if (j < size %26amp;%26amp; queue[j] j++; ?)J/uU2w
if (queue[k]>queue[j]) file://不用交换 D{s87h
break; i%!<6K6UT
SortUtil.swap(queue,j,k); pHoHngyi&
k = j; r-wCAk}m*?
} (D%vN&F
} G"` }"T0}
private void fixUp(int k) { (BPO*'
while (k > 1) { YTFU#F
int j = k >> 1; Y~g\peG7
if (queue[j]>queue[k]) jan}}7Dly
break; haBmwq(f
SortUtil.swap(queue,j,k); ,|d9lK`"P
k = j; _Iminet
} iMJt8sd
} l99Lxgx=
:Rb\Ca
} j&,Gv@
{N>ju
} `@ YV
zwZvKV/g
SortUtil： #lrwKHZ+
X+ITW#
package org.rut.util.algorithm; 2zqaR[C
SFRP ?s
import org.rut.util.algorithm.support.BubbleSort; ,\J 8(,%L
import org.rut.util.algorithm.support.HeapSort; <wk
import org.rut.util.algorithm.support.ImprovedMergeSort; 6`O,mpPu4G
import org.rut.util.algorithm.support.ImprovedQuickSort; ru@#s2
import org.rut.util.algorithm.support.InsertSort; PkrVQH9^w
import org.rut.util.algorithm.support.MergeSort; 9:4S[mz/hD
import org.rut.util.algorithm.support.QuickSort; w.w{L=p:<"
import org.rut.util.algorithm.support.SelectionSort; $*942. =Q
import org.rut.util.algorithm.support.ShellSort; pdRM%ug
?/OF=C#
/** ~*7$aj
* @author treeroot E+i*u
* @since 2006-2-2 o3dqsQE%
* @version 1.0 )][U6e
*/ Ny2 Z <TW
public class SortUtil { _i {Y0d+
public final static int INSERT = 1; zawu(3?~)5
public final static int BUBBLE = 2; y<kUGsD
public final static int SELECTION = 3; +Q u.86dH
public final static int SHELL = 4; M i& ;1!bg
public final static int QUICK = 5; LAlwQ^v|
public final static int IMPROVED_QUICK = 6; >Xk42zvqn
public final static int MERGE = 7; v']_)
public final static int IMPROVED_MERGE = 8; oh< -&3Jn
public final static int HEAP = 9; +#MXeUX"
O3@DU#N&s
public static void sort(int[] data) { }yK7LooM
sort(data, IMPROVED_QUICK); ?4%H(k5A
} [(@K;6o
private static String[] name={ R>O_2`c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H[u9C:}9b
}; gZ4' w`4r
sNDo@u7
private static Sort[] impl=new Sort[]{ 7S}0Kuk)
new InsertSort(), s{@R|5
new BubbleSort(), Ob/)f)!!
new SelectionSort(), q13fmK(n-5
new ShellSort(), -*' ?D@l
new QuickSort(), 4>=M"DhB
new ImprovedQuickSort(), _ l|%~
new MergeSort(), ~D9Cu>d9
new ImprovedMergeSort(), 7A\`
new HeapSort() o6MFMA+vi
}; d}4NL:=&
:awkhx
public static String toString(int algorithm){ OP1`!P y
return name[algorithm-1]; ^$:w
} QFx3N%
!b+4[xky
public static void sort(int[] data, int algorithm) { Zu.hcDw1
impl[algorithm-1].sort(data); ,!l_
} &`I(QY
T&_&l;syA
public static interface Sort { #gQn3.PX+y
public void sort(int[] data); 3P6O]x<-?
} %3a-@!|1<
>BbX:
public static void swap(int[] data, int i, int j) { gS'{JZu2
int temp = data; 9,'m,2%W
data = data[j]; Qb^G1#r@C
data[j] = temp; $Aw@xC^!
} D`JBK?~
} K5qCPt`'