[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; ?pmHFlx
} VQt0 4?
int i1=l; 3,3N^nSD
int i2=mid+1; h 0Q5-EA
for(int cur=l;cur<=r;cur++){ 9d659iC
if(i1==mid+1) ^98~U\ar
data[cur]=temp[i2++]; UYJZYP%r
else if(i2>r) 13=AW
data[cur]=temp[i1++]; kd(8I_i@
else if(temp[i1] data[cur]=temp[i1++]; O"9\5(w
else oxA<VWUNT
data[cur]=temp[i2++]; zT]8KA
} lIS-4QX1
} e{K 215
-zgI_u9=EB
} hBUn \~z
`i*E~'
改进后的归并排序: w+|L+h3L7
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package org.rut.util.algorithm.support; 5r|,CQ7o
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import org.rut.util.algorithm.SortUtil; 19)i*\+
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/** -<!NXm|kvz
* @author treeroot 4N3R|
* @since 2006-2-2 !9r$e99R
* @version 1.0 $k%2J9O
*/ 7(8;to6(
public class ImprovedMergeSort implements SortUtil.Sort { BC.87Fji/
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private static final int THRESHOLD = 10; 9~XAq^e
Rtl"Ub@HV
/* `(V3:F("@
* (non-Javadoc) q"J]%zO
* sIGMA$EK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S`0(*A[W*
*/ u|TeE\0
public void sort(int[] data) { %T%sGDCV
int[] temp=new int[data.length]; 1};Stai'
mergeSort(data,temp,0,data.length-1); 9}<ile7^
} <0&*9ZeD
pJ"qu,w
private void mergeSort(int[] data, int[] temp, int l, int r) { IueFx u
int i, j, k; )23H1
int mid = (l + r) / 2; l'.VKh\C
if (l == r) Ckuh:bs
return; <uw9DU7G
if ((mid - l) >= THRESHOLD) m8hk:4Ae
mergeSort(data, temp, l, mid); g7`LEF <A
else w``ST
insertSort(data, l, mid - l + 1); <)c)%'v
if ((r - mid) > THRESHOLD) 9IfmW^0
mergeSort(data, temp, mid + 1, r); ;))+>%SGCt
else c9u`!'g`i
insertSort(data, mid + 1, r - mid); K!Y71_#
Yu^4VXp~M%
for (i = l; i <= mid; i++) { ~Otoqu|
temp = data; mnX2a
} :KP@RZm
for (j = 1; j <= r - mid; j++) { 6}Ci>_i4#
temp[r - j + 1] = data[j + mid]; ag[wdoj
} H=vUYz
int a = temp[l]; `0gyr(fES
int b = temp[r]; R"t,xM
for (i = l, j = r, k = l; k <= r; k++) { WO>nIo5Y
if (a < b) { D8?Vn"
data[k] = temp[i++]; s$`0yGmQ
a = temp; D'PI1 0t
} else { T_5H&;a
data[k] = temp[j--]; =K[yT:
b = temp[j]; [<yaXQxl
} P{>!5|k
} >jLY"
} yjJ5>cg
@:vwb\azVD
/** `kXs;T6&
* @param data y/7\?qfTk
* @param l ~P**O~
* @param i :{l_FY436
*/ qt"m
private void insertSort(int[] data, int start, int len) { MH\dC9%p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \V~eVf;~
} Moza".fiN
} J<h$ wM
} rw JIx|(
} bwMm#f
0=1T.4+=
堆排序： N5 6g+,w%)
Z=o2H Bm7
package org.rut.util.algorithm.support; 3bH'H*2
aeM+ d`f
import org.rut.util.algorithm.SortUtil; n 0L^e
=X:Y,?
/** 0~/_|?]`7
* @author treeroot z46~@y%k
* @since 2006-2-2 d{3QP5
* @version 1.0 }|NCboM^_
*/ Y.rsR6
public class HeapSort implements SortUtil.Sort{ n;Vs_u/Nx
"]Xc`3SM
/* (non-Javadoc) OA;XiR$xP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ai3*QX
*/ I,vJbvvl!
public void sort(int[] data) { c`w}|d]mC
MaxHeap h=new MaxHeap(); ~=l;=7 T
h.init(data); 7;wd(8
for(int i=0;i h.remove(); `|&O*`
System.arraycopy(h.queue,1,data,0,data.length); @lrztM
} -x`@6
:*9Wh
private static class MaxHeap{ `+:`_4
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void init(int[] data){ RMu~l@
this.queue=new int[data.length+1]; <R=Zs[9M1
for(int i=0;i queue[++size]=data; lzVq1@B
fixUp(size); /t$d\b17pX
} {B*s{{[/'
} R$[vm6T?
>!1-lfa8
private int size=0; vV-`jsq20H
w%jII{@,
private int[] queue; A#iV=76_
]jp6k<KF
public int get() { 1K50Z.o&@
return queue[1]; Y&Z.2>b
} GH$pKB
R8Fv{7]c
public void remove() { Ean5b>\
SortUtil.swap(queue,1,size--); =W!/Z%^*8
fixDown(1); 5K8^WK
} $5%SNzzl
file://fixdown ;+hH
private void fixDown(int k) { e8?jmN`2
int j; l}A93jSL
while ((j = k << 1) <= size) { M&9+6e'-F
if (j < size %26amp;%26amp; queue[j] j++; 60?%<oJ oH
if (queue[k]>queue[j]) file://不用交换 T!)(Dv8@F
break; PIS2Ed]
SortUtil.swap(queue,j,k); -k"/X8
k = j; P8/0H(,
} '3^'B03
} *_\_'@1|J)
private void fixUp(int k) { Yufc{M00
while (k > 1) { $suzW;{#
int j = k >> 1; v O_*yh1
if (queue[j]>queue[k]) :nOFR$W
break; ":QZy8f9%
SortUtil.swap(queue,j,k); TJXT-\Vk
k = j; w@w(-F!%l
} 8P&:_T!
} ZyFjFHe+
z1X`o
} <*cikXS
D_zZXbNc
} suDQ~\n
hf&9uHN%7m
SortUtil： f x+/C8GK
88wa7i*
package org.rut.util.algorithm; ri-b=|h2j
oE]QF.n#
import org.rut.util.algorithm.support.BubbleSort; -]M5wb2,
import org.rut.util.algorithm.support.HeapSort; G2: agqL/
import org.rut.util.algorithm.support.ImprovedMergeSort; 8VXH+5's
import org.rut.util.algorithm.support.ImprovedQuickSort; _u QOHwn
import org.rut.util.algorithm.support.InsertSort; 8&b,qQ~
import org.rut.util.algorithm.support.MergeSort; O)r4?<Q
import org.rut.util.algorithm.support.QuickSort; WOL:IZX%
import org.rut.util.algorithm.support.SelectionSort; L$M9w
import org.rut.util.algorithm.support.ShellSort; cTTL1SW
{kR#p %E]
/** > /caXvS
* @author treeroot )bscBj@
* @since 2006-2-2 3AN/ H
* @version 1.0 XUuN )i
*/ $*=<Yw4
public class SortUtil { bY~pc\V:`w
public final static int INSERT = 1; 'E""amIJ
public final static int BUBBLE = 2; oe-\ozJ0
public final static int SELECTION = 3; L) T (<
public final static int SHELL = 4; Qh\60f>0
public final static int QUICK = 5; H6/$d
public final static int IMPROVED_QUICK = 6; [S!/E4>['
public final static int MERGE = 7; svH !1b
public final static int IMPROVED_MERGE = 8; 1o{Mck
public final static int HEAP = 9; 2`=7_v
_KAQ}G3
public static void sort(int[] data) { ]Er$*7f
sort(data, IMPROVED_QUICK); ;>7De8v@@
} Q*~]h;6\{d
private static String[] name={ z!9-:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >e$PP8&i_T
}; TAW/zpps$
]N F[>uiW
private static Sort[] impl=new Sort[]{ 7WZ+T"O{I
new InsertSort(), ePo}y])2
new BubbleSort(), gc$l^`+M
new SelectionSort(), Oxd]y1
new ShellSort(), :eVq#3}
new QuickSort(), DEZveQr=
new ImprovedQuickSort(), H"WprHe
new MergeSort(), hkQ"OsU
new ImprovedMergeSort(), XlR@pr6tw
new HeapSort() tK\~A,=
}; E hMNap}5"
z-)O9PV
public static String toString(int algorithm){ Lw>N rY(Y
return name[algorithm-1]; BnasI;yWb
} wz%NbLy-
*gWwALGo5
public static void sort(int[] data, int algorithm) { $-sHWYZ
impl[algorithm-1].sort(data); Uz]|N6`
} YNi.SXH
vyI!]p
public static interface Sort { }&D32\
public void sort(int[] data); U-M>=3|N
} +52{-a,>
-nV9:opD
public static void swap(int[] data, int i, int j) { I b5rqU\
int temp = data; E~"y$Fqe
data = data[j]; o?\?@H
data[j] = temp; /%io+94
} C;^X[x%h7$
} ~Z'?LV<t