[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; 6uXW`/lvX
} pzax~Vp
int i1=l; tZYI{m{
int i2=mid+1; 7, 13g)
for(int cur=l;cur<=r;cur++){ /T(\}Z
if(i1==mid+1) g"&bX4uD)
data[cur]=temp[i2++]; 4@V]zfu^Q
else if(i2>r) L@_">'pR
data[cur]=temp[i1++]; &+j^{a
else if(temp[i1] data[cur]=temp[i1++]; j>Z]J'P
else >YBpB,WND
data[cur]=temp[i2++]; `eWcp^|
} cGc|n3(
} ThlJhTh<%4
>a7(A#3@d
} eE{L>u
:.Qe=}9
改进后的归并排序: uBTT {GGQ
m3(T0.j0P
package org.rut.util.algorithm.support; -n *>zGc
9$,gTU_a
import org.rut.util.algorithm.SortUtil; 9sCk\`n
8$v7|S6 z
/** WDGGT.hG
* @author treeroot ;F""}wzn
* @since 2006-2-2 ^!<7#kX
* @version 1.0 3N"&P@/0x
*/ N &[,nUd
public class ImprovedMergeSort implements SortUtil.Sort { ]k:m2$le
6}T%m?/}
private static final int THRESHOLD = 10; iW}l[g8sw!
KY`96~z
/* MH.,s@
* (non-Javadoc) YU=ZZEVi
* D'`"_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E)JyKm.
*/ ow_y
public void sort(int[] data) { 6lWFxbh
int[] temp=new int[data.length]; V"H7zx
mergeSort(data,temp,0,data.length-1); Jo3(bl%u
} unnx#e]
uvDoo6'
private void mergeSort(int[] data, int[] temp, int l, int r) { 1bJ]3\
int i, j, k; ' f$L
int mid = (l + r) / 2; 2]3HX3
if (l == r) ~Ex.Yp8.
return; "-n%874IT
if ((mid - l) >= THRESHOLD) ~J-|,ZMd
mergeSort(data, temp, l, mid); 5; PXF
else b_jZL'en
insertSort(data, l, mid - l + 1); eqZ+no
if ((r - mid) > THRESHOLD) -+rF]|Wi
mergeSort(data, temp, mid + 1, r); !Gp3/<"Wy$
else _`_IUuj$E
insertSort(data, mid + 1, r - mid); !e'0jf-~
7vaN&%;E%
for (i = l; i <= mid; i++) { NceB'YG|
temp = data; t/*K#]26
} fHd!/%iG
for (j = 1; j <= r - mid; j++) { {* j^g6;
temp[r - j + 1] = data[j + mid]; [u9JL3
} !049K!rP{
int a = temp[l]; `SjD/vNE
int b = temp[r]; ~BvY8\@B
for (i = l, j = r, k = l; k <= r; k++) { BO4 K#H7
if (a < b) { 9J7J/]7f
data[k] = temp[i++]; uUz`=4%A
a = temp; ! F <] T
} else { 8F^,8kIR
data[k] = temp[j--]; RF5q5<0
b = temp[j]; |R;l5ZKvV
} +F o$o
} em1cc,
} %L j0
%x6Ov\s2
/** 6 r.H8
* @param data i6md fp|k
* @param l lW$&fuDHF
* @param i lP*
*/ :5S |x/
private void insertSort(int[] data, int start, int len) { qggk:cN1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A6N~UV*_
} Pc(n@'m~
} rMHQzQ0%
} 8pPC 9ew\=
} ^.#X<8hr
>&;>PZBPCO
堆排序： l#b|@4:I
+`*qlP;
package org.rut.util.algorithm.support; 7wQ+giu
xegQRc
import org.rut.util.algorithm.SortUtil; fJWxJSdi
rg5]`-!=
/** sLG>>d3R1
* @author treeroot 0\'Q&oTo
* @since 2006-2-2 q#99iiG1
* @version 1.0 JOrELrMx
*/ i Y*o;z,~
public class HeapSort implements SortUtil.Sort{ U|J$?aFDr
5fu+rU-#
/* (non-Javadoc) ,\lYPx\P[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F#1 Kk#t
*/ 1l+kO,X]
public void sort(int[] data) { 5L-lpT8P
MaxHeap h=new MaxHeap(); [0u.}c;(
h.init(data); .Iwur;/\
for(int i=0;i h.remove(); .?rbny
System.arraycopy(h.queue,1,data,0,data.length); _ }E-~I>
} %j'G.*TD
;8*XOC;[
private static class MaxHeap{ h `\$sT!Z
nn@^K6
void init(int[] data){ 7m:|u*ij2~
this.queue=new int[data.length+1]; K`QOU-M@}
for(int i=0;i queue[++size]=data; RpO@pd m
fixUp(size); 7R9nMGJ@
} 5: daa
} 7fju
t7w-TJvP
private int size=0; &8<<!#ob
0R HS]cN
private int[] queue; khU6*`lQ
7/H^<%;y
public int get() { fJN*s
return queue[1]; C.J`8@a]?
} Oj4v#GK]
4\LZD{
public void remove() { rv9B}%e
SortUtil.swap(queue,1,size--); #NvQmz?J?
fixDown(1); bTLMd$
} FXP6zHsV
file://fixdown k"xGA*B|
private void fixDown(int k) { {=UFk-$=
int j; h+,'B&=|_
while ((j = k << 1) <= size) { d_Q*$Iz)3
if (j < size %26amp;%26amp; queue[j] j++; #zON_[+s9
if (queue[k]>queue[j]) file://不用交换 0QMTIAW6h
break; d<Ggw#}:m
SortUtil.swap(queue,j,k); C:`;d&d
k = j; i2){xg~c
} M.>^{n$ z
} 0b/ir2
private void fixUp(int k) { *cbeyB{E
while (k > 1) { e`i7ah;
int j = k >> 1; CSMeSPOm]
if (queue[j]>queue[k]) E7Ibp79}N
break; nX0HT )}
SortUtil.swap(queue,j,k); {?E<](+0
k = j; _e%dM
} v" }WP34
} G&q'#3ieC
+R-h ,$\=7
} 'E4AV58.
Ntb:en!X
} pb!V|#u"
qgoJ4Z*
SortUtil： hd+]Ok7"
l)4O .*
package org.rut.util.algorithm; M!1U@6n!=)
j'K38@M:MN
import org.rut.util.algorithm.support.BubbleSort; |]`hXr
import org.rut.util.algorithm.support.HeapSort; \(I0wEQo$
import org.rut.util.algorithm.support.ImprovedMergeSort; @q K]JK
import org.rut.util.algorithm.support.ImprovedQuickSort; a1Hz3y~S/
import org.rut.util.algorithm.support.InsertSort; `@[l\.Vt:
import org.rut.util.algorithm.support.MergeSort; ]r4bRK[1
import org.rut.util.algorithm.support.QuickSort; i AdGgK
import org.rut.util.algorithm.support.SelectionSort; X) V7bVW
import org.rut.util.algorithm.support.ShellSort; s~*}0-lS
9Ycn0
/** 0ZMJ(C
* @author treeroot M=OCzgj
* @since 2006-2-2 v??TJ^1
* @version 1.0 ,P{mk%=9
*/ xH-X|N
public class SortUtil { e}'gvm
public final static int INSERT = 1; ohUdGO[/
public final static int BUBBLE = 2; :ygWNK[6D
public final static int SELECTION = 3; A{# Nwd>
public final static int SHELL = 4; "(v%1tGk
public final static int QUICK = 5; VYZU eh
public final static int IMPROVED_QUICK = 6; r9# \13-
public final static int MERGE = 7; zN#*G i'
public final static int IMPROVED_MERGE = 8; Mi+H#xx16
public final static int HEAP = 9; 0Vkl`DmeM.
e ^Ds
public static void sort(int[] data) { ]hA,LY f
sort(data, IMPROVED_QUICK); LxLy+yC#p
} `K*b?:0lp
private static String[] name={ B z^|SkEit
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q2hFOm
}; T.REq4<
M|q~6oM
private static Sort[] impl=new Sort[]{ #]CFA9z
new InsertSort(), $&{ti.l
new BubbleSort(), =-NiO@5o
new SelectionSort(), :_5/u|{
new ShellSort(), !gF9k8\Yr$
new QuickSort(), :4:N f
new ImprovedQuickSort(), aTd D`h
new MergeSort(), "g>.{E5
new ImprovedMergeSort(), )"Q*G/+2Ie
new HeapSort() KzjC/1sd
}; c~0{s>
{ox2Tg?
public static String toString(int algorithm){ O:'?n8rWL
return name[algorithm-1]; Xd<t5{bD!
} S4N(cn&
('O}&F1
public static void sort(int[] data, int algorithm) { 6sJw@OaJ
impl[algorithm-1].sort(data); ?^i1_v7 Bi
} 0V$k7H$Z
4[yIOs
public static interface Sort { ?WUF!Jk
public void sort(int[] data); +-<}+8G;
} z0%\OhuCcf
VA]e
public static void swap(int[] data, int i, int j) { 1TS0X:TCn
int temp = data; jCioE
data = data[j]; )?=YT
data[j] = temp; (Glr\q]jF\
} ;{#^MD MB
} 26I