[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; %2yAvGa1
} ]*ov&{'
int i1=l; elbG\qXBp
int i2=mid+1; d=e{]MG(
for(int cur=l;cur<=r;cur++){ .C5@QKU
if(i1==mid+1) T"W9YpZ
data[cur]=temp[i2++]; ~Fx&)kegTo
else if(i2>r) iVeQ]k(u
data[cur]=temp[i1++]; ="B n=>
else if(temp[i1] data[cur]=temp[i1++]; exphe+b
else Kpg:yrc['
data[cur]=temp[i2++]; oBw}hH,hp
} n>llSK
} +"L$ed(=nJ
"=A|K~b
} B| Q6!
0$2={s4ze
改进后的归并排序: K/Jk[29"\
KO-a; [/
package org.rut.util.algorithm.support; MFTC6L+T
qeMv Vf
import org.rut.util.algorithm.SortUtil; od,tfLw4
p\+6"28{_~
/** pF='jj51
* @author treeroot pbdF]>\
* @since 2006-2-2 8_iHVc;<
* @version 1.0 t F/nah
*/ .&(8(C
public class ImprovedMergeSort implements SortUtil.Sort { 4e/cqN6
sV'v* 1|
private static final int THRESHOLD = 10; |#cAsf_{
9cOx@c+/
/* E$T(Qu<-
* (non-Javadoc) A\C'dZ <N
* 'bm:u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IHVMHOq}'
*/ tw86:kYEz
public void sort(int[] data) { S.]MOB dt
int[] temp=new int[data.length]; )G4rJ~#@
mergeSort(data,temp,0,data.length-1); %Qd3BZ
} ZeTL$E[E}
N ^f}ui i
private void mergeSort(int[] data, int[] temp, int l, int r) { > Z++^YVE
int i, j, k; .Qk{5=l6P
int mid = (l + r) / 2; `]hCUaV
if (l == r) =phiD&=
return; `5<1EGJsD
if ((mid - l) >= THRESHOLD) %1Jd^[W
mergeSort(data, temp, l, mid); sU*3\
else UKYupLu5
insertSort(data, l, mid - l + 1); p5`ZyD]+
if ((r - mid) > THRESHOLD) +3HPA#A
mergeSort(data, temp, mid + 1, r); Gt5$6>A
else @tQ2E}psP,
insertSort(data, mid + 1, r - mid); e/P4mc)
CKN8z
for (i = l; i <= mid; i++) { `uhL61cMp
temp = data; .$^wy3:F"
} ] ?9t-
for (j = 1; j <= r - mid; j++) { c85O_J
temp[r - j + 1] = data[j + mid]; um}N%5GAa
} 44<v9uSK
int a = temp[l]; _r7=&oL.Q
int b = temp[r]; @e={Wy+Vm(
for (i = l, j = r, k = l; k <= r; k++) { uOb2npPj
if (a < b) { )BB%4=u@~.
data[k] = temp[i++]; [>wzl"cHW
a = temp; Pzptr%{
} else { -g<cinNSp
data[k] = temp[j--]; rBS2>?
b = temp[j]; CHg]Ul
} Z3Gm
} ,NDxFy;d
} &EGY+p|2Y
n)Hk8)^8
/** RAdvIIQp:
* @param data T[m ~6
* @param l Q{8qm<0g
* @param i SUo^c1)G
*/ +=Yk-nJ
private void insertSort(int[] data, int start, int len) { 0|GpZuGO9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a2[8wv1
} $xQ"PJ2
} yX3PUO9
} phe"JNML
} IF& PGo
G1p43
堆排序： F"Uh/EO<
U~Xf=f_Q$
package org.rut.util.algorithm.support; z?I+u*rF6
Mo~ki"9.
import org.rut.util.algorithm.SortUtil; v^;-@ddr
7<fL[2-
/** mQFa/7FX
* @author treeroot Wf_CR(
* @since 2006-2-2 QZ?O;K1|y
* @version 1.0 'G52<sF
*/ zU=YNrn
public class HeapSort implements SortUtil.Sort{ 6xyY+
FBYll[8
/* (non-Javadoc) )K8P+zn~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dEL3?-;'
*/ 5Zzr5WM
public void sort(int[] data) { n#)PvV~
MaxHeap h=new MaxHeap(); ]v<d0"2
h.init(data); CGCQa0
for(int i=0;i h.remove(); u0wn=Dg
System.arraycopy(h.queue,1,data,0,data.length); S3b|wUf
} umqLKf=x!
o; 6fvn
private static class MaxHeap{ 10/x'#(
Q%+}
void init(int[] data){ #aj|vox}
this.queue=new int[data.length+1]; Ii,~HH
for(int i=0;i queue[++size]=data; ~:2&/MOP?
fixUp(size); v/]Qq
} lt&$8jh
} OTnu{<.a
%3ou^mcj
private int size=0; 7s0)3HR}
z7| s%&
private int[] queue; |*Of^IkG0
-mE
public int get() { {VS''Lv
return queue[1]; hEVjeC
} bcUC4g\9N
qPL^zM+
public void remove() { r9+E'\
SortUtil.swap(queue,1,size--); H&~5sEGa
fixDown(1); ]z+*?cc
} ROPC |
file://fixdown =fL6uFmxI@
private void fixDown(int k) { E]e,cd
int j; =X)Q7u".7
while ((j = k << 1) <= size) { ,Le&I9*%
if (j < size %26amp;%26amp; queue[j] j++; Y;'VosTD
if (queue[k]>queue[j]) file://不用交换 F_ ,L2J
break; ;r gH}r
SortUtil.swap(queue,j,k); ;Fx')
k = j; _)OA$
} )GB3=@
} ){+.8KI
private void fixUp(int k) { zJz82jMm
while (k > 1) { 'bZMh9|
int j = k >> 1; YgO aZqN
if (queue[j]>queue[k]) *?EO n-
break; (~q#\
SortUtil.swap(queue,j,k); Pz5ebhgq
k = j; IOSuaLH^
} k&MlQ2'!<
} ?BWHr(J
M(_^'3u
} #H'sZv
-}=@ *See#
} _fVh%_oH1
)?!vJb"
SortUtil： MV Hz$hyB
l81&[
package org.rut.util.algorithm; 6(ka"Vu~
S4#A#a2J
import org.rut.util.algorithm.support.BubbleSort; N>uA|<b,
import org.rut.util.algorithm.support.HeapSort; S^3g]5YX
import org.rut.util.algorithm.support.ImprovedMergeSort; [$hptQv
import org.rut.util.algorithm.support.ImprovedQuickSort; 0ClX
import org.rut.util.algorithm.support.InsertSort; uAW*5 `[
import org.rut.util.algorithm.support.MergeSort; u5u0*c
import org.rut.util.algorithm.support.QuickSort; B, QC-Tn
import org.rut.util.algorithm.support.SelectionSort; A8_\2'b
import org.rut.util.algorithm.support.ShellSort; Sf+(1_^`t
zF[3%qZE:T
/** 4]Un=?)I
* @author treeroot Paae-EmC
* @since 2006-2-2 U@o2gjGN
* @version 1.0 OVDMC4K2z!
*/ :6 Hxxh
public class SortUtil { o8~f
public final static int INSERT = 1; I ybl;u
public final static int BUBBLE = 2; &*jxI[
public final static int SELECTION = 3; s|{^ }4{
public final static int SHELL = 4; I}*]m%'-Y
public final static int QUICK = 5; Ma`
public final static int IMPROVED_QUICK = 6; aHBByH
public final static int MERGE = 7; }V1DyLg:
public final static int IMPROVED_MERGE = 8; >XD02A[
public final static int HEAP = 9; +Z 93`
u#zP>!
public static void sort(int[] data) { R-g>W
sort(data, IMPROVED_QUICK); M!xm1-,[
} DiZ!c"$
private static String[] name={ 7i-W*Mb:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q#mFN/.(+
}; gE-w]/1zD5
q8'@dH
private static Sort[] impl=new Sort[]{ 9pVf2|5hj
new InsertSort(), v`z=OHc
new BubbleSort(), z4%Z6Y
new SelectionSort(), 1A|x$j6m
new ShellSort(), V\iIvBpWg
new QuickSort(), ,xAM[h&
new ImprovedQuickSort(), Y(#d8o}}#
new MergeSort(), )z?&"I
new ImprovedMergeSort(), 902!M65[rG
new HeapSort() +Op%,,Db
}; >)AE|j`
/tId#/Y
public static String toString(int algorithm){ Ev$-PX
return name[algorithm-1]; ;[WSf{k
} O4b-A3:
9E->;0-
public static void sort(int[] data, int algorithm) { H3p4,Y}'#
impl[algorithm-1].sort(data); ~aauW?
} h 7(H%(^_
]X>QLD0W
public static interface Sort { +(QMy&DtS
public void sort(int[] data); f{+LCMbC6
} Lyf? V(S
hr~qt~Oi
public static void swap(int[] data, int i, int j) { !T#8N7J>
int temp = data; /ygUd8@
data = data[j]; ;y?D1o^r8W
data[j] = temp; `>`K7-H
} .236d^l
} 4'}_qAT