[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; [r5k8TB1
} Jz6,2,LN
int i1=l; YKsc[~ h
int i2=mid+1; Tx'ctd#Y
for(int cur=l;cur<=r;cur++){ N$SJK
if(i1==mid+1) +B0G[k7
data[cur]=temp[i2++]; v/B:n
else if(i2>r) vAMr&[
data[cur]=temp[i1++]; jL[ hB
else if(temp[i1] data[cur]=temp[i1++]; J6Q}a7I#
else DfQD!}=
data[cur]=temp[i2++]; az2CFd^M
} 8fwM)DKS
} .xp|w^
%d\|a~p:
} H\Jpw
IN%04~=H
改进后的归并排序: `e!hT@Xxa
2dF:;k k
package org.rut.util.algorithm.support; N%.DjH
5{&<X.jv
import org.rut.util.algorithm.SortUtil; TGJ\f
wzRIvm{
/** Q5s?/r
* @author treeroot 9w! G
* @since 2006-2-2 eL+L {Ac
* @version 1.0 nE)|6
*/ 0w_2E
public class ImprovedMergeSort implements SortUtil.Sort { _~ipO1*
S3k>34_%9
private static final int THRESHOLD = 10; 'Na/AcRdg
.{|AHW&0<
/* !cWnQRIt_F
* (non-Javadoc) j>0~"A
* 9#;UQ.qA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) igW>C2J
*/ rpNe8"sh
public void sort(int[] data) { *G{Zo*2< i
int[] temp=new int[data.length]; iY2%_b!5
mergeSort(data,temp,0,data.length-1); z4nVsgQ$
} !r8Jo{(pb
69v[*InSd
private void mergeSort(int[] data, int[] temp, int l, int r) { XTZI!
int i, j, k; j8G>0f)
int mid = (l + r) / 2; %T&#JF+;
if (l == r) YTco;5/
return; ^<e"OV
if ((mid - l) >= THRESHOLD) o\luE{H .?
mergeSort(data, temp, l, mid); (qP !x 2j
else 0P_Y6w+
insertSort(data, l, mid - l + 1); E5%ae (M^
if ((r - mid) > THRESHOLD) d.7Xvx0Yww
mergeSort(data, temp, mid + 1, r); p ?HODwZ
else diLjUC`69
insertSort(data, mid + 1, r - mid); ,QpDz{8
d\ &jl`8*
for (i = l; i <= mid; i++) { R<!WW9IM
temp = data; B9_0 Yq
} iK"j@1|
for (j = 1; j <= r - mid; j++) { a91Q*X%
temp[r - j + 1] = data[j + mid]; >Q~"/-bN)
} L?^C\g6u]
int a = temp[l]; 8<g_JW[%
int b = temp[r]; C%P"Ds=w0N
for (i = l, j = r, k = l; k <= r; k++) { "*@iXJxv5
if (a < b) { y(RbW_ ?
data[k] = temp[i++]; g"3h#SMb
a = temp; , "zS pN
} else { } V4"-;P
data[k] = temp[j--]; *ihg'
b = temp[j]; w?AE8n$8
} Oz9k.[j(
} ubhem(p#
} oh;F]*k6
FFgy=F
/** Jz#ZDZkm
* @param data qi7wr\XNW
* @param l O'."ca]:5
* @param i &%Hj.
*/ )`rC"N)
private void insertSort(int[] data, int start, int len) { =*'X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ftq~AF
} 'q[V*4g
} lb1(1|#
} \Mlj 7.u]
} q_f v1U3
tazBZ'\c
堆排序： y|KDh'Y
^d"tymDd
package org.rut.util.algorithm.support; (6\A"jey\x
wH#k~`M
import org.rut.util.algorithm.SortUtil; &TbnZnv
&F#X0h/m=
/** Ro:-u7q
* @author treeroot XB;;OP12
* @since 2006-2-2 @V:b Co
* @version 1.0 WaMn[/{
*/ bM^'q
public class HeapSort implements SortUtil.Sort{ g6W.Gl"5\w
"E2 g7n&
/* (non-Javadoc) NHc+QMbou(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q}2w~Cn\S
*/ )QZ?Bf
public void sort(int[] data) { ;pB?8Z
MaxHeap h=new MaxHeap(); jEO;
h.init(data); hrAI@.Bo
for(int i=0;i h.remove(); <bTa88,)
System.arraycopy(h.queue,1,data,0,data.length); x@k9]6/zs
} /|DQ_<*
cL WM]\Y
private static class MaxHeap{ vOP[ND=T
OQsH,'
void init(int[] data){ Ahebr{u
this.queue=new int[data.length+1]; uw<Ruy
for(int i=0;i queue[++size]=data; ?4~lA L1
fixUp(size); T@S+5(
} n+i}>3'A
} (^Ln|3iz
uIPR*9~6o
private int size=0; 9%dNktt
{"y6l
private int[] queue; !kz\ {
``\H'^{B
public int get() { ><DE1tG
return queue[1]; {M$8V~8D
} '\;tmD"N5#
3whyIXs
public void remove() { RcE%?2lD
SortUtil.swap(queue,1,size--); ]zm6;/S
fixDown(1); Av[jFk
} OL=bhZ
file://fixdown 9!OpW:bR|
private void fixDown(int k) { KG?]MVXA
int j; T<?;:MO88
while ((j = k << 1) <= size) { D;E&;vP6%
if (j < size %26amp;%26amp; queue[j] j++; xSf3Ir(,
if (queue[k]>queue[j]) file://不用交换 .KD07
break; aD:+,MZ
SortUtil.swap(queue,j,k); ["7}u^z@<+
k = j; <*\J 6:^n
} 8;5/_BwMu
} +l#2u#e
private void fixUp(int k) { !`WuLhB`
while (k > 1) { $ S49v
int j = k >> 1; Z~R i%XG
if (queue[j]>queue[k]) "&ks83
break; yqU++;6
SortUtil.swap(queue,j,k); ~Mx fud
k = j; Em7q@
} jL8zH
} 4M]8po/;
N4:'X6u;
} s6$3[9Vh&9
Dz{e@+>M
} RD4)NN6y5}
A"'MRYT`
SortUtil： = `^jz}
oxzNV&D[{`
package org.rut.util.algorithm; 1mX*0>
sa`Yan
import org.rut.util.algorithm.support.BubbleSort; ST3qg6Cq2J
import org.rut.util.algorithm.support.HeapSort; I%p#E#[G
import org.rut.util.algorithm.support.ImprovedMergeSort; qEAF!iB]L
import org.rut.util.algorithm.support.ImprovedQuickSort; )>fi={!=c
import org.rut.util.algorithm.support.InsertSort; 7'|PHQ?S
import org.rut.util.algorithm.support.MergeSort; xR:h^S^W ~
import org.rut.util.algorithm.support.QuickSort; p{rS -`I
import org.rut.util.algorithm.support.SelectionSort; nR7\ o(!
import org.rut.util.algorithm.support.ShellSort; oo!g?X[[
L9T u>4
/** }]I?vyQ#V
* @author treeroot <IVz mzpL
* @since 2006-2-2 .6K>"
* @version 1.0 =lwS\mNs
*/ #lF<="y%X
public class SortUtil { jO55<s94
public final static int INSERT = 1; %U GlAyj
public final static int BUBBLE = 2; /<0D E22
public final static int SELECTION = 3; Q7|13^|C
public final static int SHELL = 4; 2?QJh2
public final static int QUICK = 5; 5F"?]'*/
public final static int IMPROVED_QUICK = 6; X}(0y
public final static int MERGE = 7; 9$&e~^&B
public final static int IMPROVED_MERGE = 8; ~t={ \,X\
public final static int HEAP = 9; YJ$ewK4E#.
?N*0S'dY
public static void sort(int[] data) { CeTr%j
sort(data, IMPROVED_QUICK); _sVs6AJ
} $]kg_l)
private static String[] name={ ImY.HB^&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >x4[7YAU{
}; d8HB2c5y0i
}&DB5M
private static Sort[] impl=new Sort[]{ m]\zt
new InsertSort(), SbZt\a 8
new BubbleSort(), u4@e=vWI
new SelectionSort(), iwQ-(GjM[A
new ShellSort(), "Vq]|j,B/c
new QuickSort(), 4Umsc>yfK
new ImprovedQuickSort(), aLi_Hrb9
new MergeSort(), +5[oY,^cO
new ImprovedMergeSort(), -kbm$~P
new HeapSort() }4SSo)Uv/
}; Y/H^*1
xXZKj
public static String toString(int algorithm){ m>ycN
return name[algorithm-1]; s&hA
} S |>$0P4W(
7E`(8i
public static void sort(int[] data, int algorithm) { 5L}>+js2
impl[algorithm-1].sort(data); Rt^<xXX$
} c^O#O
z,FTsR$x
public static interface Sort { _I_?k+#WFe
public void sort(int[] data); /;AZ/Ocy!
} V<4+g/
i ,pN1_-
public static void swap(int[] data, int i, int j) { V wVQ|UH
int temp = data; PgLS\_B
data = data[j]; mSzpRa
data[j] = temp; k%}89glm
} 45sxF?GSwL
} }m%?&c