[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; (r7~ccy4
} 12k)Ek9
int i1=l; T>LtN
int i2=mid+1; geT<vh Z6
for(int cur=l;cur<=r;cur++){ 5F0sfX
if(i1==mid+1) ~}TVM%0RTq
data[cur]=temp[i2++]; I@x*>
else if(i2>r) %Cm4a49FNi
data[cur]=temp[i1++]; <Ojf&C^Z
else if(temp[i1] data[cur]=temp[i1++]; cvc.-7IO
else Lp{l&-uQ
data[cur]=temp[i2++]; 9$Hgh7'hvs
} h3JIiwv0!
} 3 #jPQ[+
U8.DPRa
} ;Hm\?n)a
wdp4-*
改进后的归并排序: ?{^T&<18t
67f#Z&r2k
package org.rut.util.algorithm.support; J)o~FC]b*
>r{,$)H0
import org.rut.util.algorithm.SortUtil; qKWkgackP
EI/_=.d
/** B%r)~?6DM
* @author treeroot Lx(Y=
* @since 2006-2-2 9fe~Q%x=u
* @version 1.0 6Lz&"C,`
*/ \7Zk[)!FL
public class ImprovedMergeSort implements SortUtil.Sort { ^yBx.GrQc
@n})oAC,
private static final int THRESHOLD = 10; m2\ZnC
"$m3xO
/* a*vi&$@`Z1
* (non-Javadoc) |n* I}w^
* (\SxG\`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GKm)wOb(*S
*/ <v0 d8
public void sort(int[] data) { ]l&_Pv!!
int[] temp=new int[data.length]; <;_X=s`f,
mergeSort(data,temp,0,data.length-1); q}+9$v
} ];(w8l
u QCQ$
private void mergeSort(int[] data, int[] temp, int l, int r) { u*PN1E
int i, j, k; 5w{_WR6,
int mid = (l + r) / 2; Z=wLNmH
if (l == r) wn|Sdp
return; ?;}2Z)
if ((mid - l) >= THRESHOLD) P^.L0T5g
mergeSort(data, temp, l, mid); h5B'w
else o3%Gc/6%
insertSort(data, l, mid - l + 1); 6kYn5:BhIi
if ((r - mid) > THRESHOLD) C;STJrew
mergeSort(data, temp, mid + 1, r); -_A0<A.
else ? NVN&zD]
insertSort(data, mid + 1, r - mid); @YV-8;hO
}JvyjE
for (i = l; i <= mid; i++) { &e2") 4oh
temp = data; \W#M]Q
} Qs</.PO
for (j = 1; j <= r - mid; j++) { lwjg57
temp[r - j + 1] = data[j + mid]; +ZXk0sP_<
} >'E'Mp.
int a = temp[l]; oXb}6YC
int b = temp[r]; +=;F vb
for (i = l, j = r, k = l; k <= r; k++) { 'KM@$2tK^q
if (a < b) { r@k&1*&
data[k] = temp[i++]; >5)$Qtz#
a = temp; XCQ=`3f
} else { @K2q*d
data[k] = temp[j--]; m<TKy_C`
b = temp[j]; # l}Y1^PDd
} 2z&HT SI
} h<.&,6R
} :'a |cjq
9?@M Zh
/** *7DQ#bD
* @param data IQY\L@"
* @param l 1;g>?18@
* @param i XeJx/'9o{
*/ mI?AI7DqK
private void insertSort(int[] data, int start, int len) { =d&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M0 =K#/
} qp'HRh@P2:
} `3\5&Bf
} jSpmE
} s$|GVv1B
m03;'Nj'7#
堆排序： exZa:9 sp
<.+hV4,3
package org.rut.util.algorithm.support; jh2D9h
/oE@F178
import org.rut.util.algorithm.SortUtil; x4R[Q&:M
SUHyg/|F
/** 2["bS++?
* @author treeroot )>C,y`,
* @since 2006-2-2 eBBqF!WDb
* @version 1.0 @6(4}&sEdm
*/ 6# ,2
public class HeapSort implements SortUtil.Sort{ 9;sebqC?
fg^$F9@
/* (non-Javadoc) :anUr<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j^mAJ5
*/ ##EMJi
public void sort(int[] data) { ~bg?V0
MaxHeap h=new MaxHeap(); pma'C\b>
h.init(data); 349W0>eOT
for(int i=0;i h.remove(); M&:[3u-
System.arraycopy(h.queue,1,data,0,data.length); Mb"i}Yt{
} z3[ J>
o.*8$$
private static class MaxHeap{ ,J!G-?:@n
DO8@/W( `
void init(int[] data){ MXq+aS{
this.queue=new int[data.length+1]; ][I}yOD70
for(int i=0;i queue[++size]=data; x?y)a9&Hm
fixUp(size); 3g0[(;
} "+~La{POc
} Xg_M{t
T:q!>"5
private int size=0; )t0Y-),vA
4&Y{kNF
private int[] queue; +.! F]0ju
4w<U%57
public int get() { s["8QCd"r
return queue[1]; q5p!Ty"
} rB}Iwp8
^M0e0
public void remove() { &O/;YGEAB
SortUtil.swap(queue,1,size--); h;u8{t"
fixDown(1); <]2X~+v
} -hZlFAZi
file://fixdown &Egw94l
private void fixDown(int k) { S|CN)8Jsi
int j; rF'_YYpr>
while ((j = k << 1) <= size) { wrSw>sE"
if (j < size %26amp;%26amp; queue[j] j++; Po~{Mpe
if (queue[k]>queue[j]) file://不用交换 ...|S]a
break; *9Ej fs7L
SortUtil.swap(queue,j,k); )*}2L_5]
k = j; ANR?An
} _lcx?IV
} AqM}@2#%%
private void fixUp(int k) { UFr ]$m&
while (k > 1) { IH(]RHTp%
int j = k >> 1; x|g>Zd/n
if (queue[j]>queue[k]) G~b/!clN
break; gY9HEfB
SortUtil.swap(queue,j,k); X0wvOs:
k = j; v0+mh]
} =4+Wx8ZeW
} ~4IkQ|,
)zzZYs&|
} 8vpB(VxV+
uQk}
} SM;UNIRVE
xn|M]E1)
SortUtil： v50w}w'
VbLwhA2W}F
package org.rut.util.algorithm; 6b`3AAGU"
9f1,E98w_
import org.rut.util.algorithm.support.BubbleSort; _ `5?/\7
import org.rut.util.algorithm.support.HeapSort; }22h)){n#Y
import org.rut.util.algorithm.support.ImprovedMergeSort; &m<:&h& b
import org.rut.util.algorithm.support.ImprovedQuickSort; zmaf@T
import org.rut.util.algorithm.support.InsertSort; }rK9M$2]u
import org.rut.util.algorithm.support.MergeSort; _-mSK/Z
import org.rut.util.algorithm.support.QuickSort; /&1FgSARK
import org.rut.util.algorithm.support.SelectionSort; NNDW)@p6z
import org.rut.util.algorithm.support.ShellSort; ^k{b8-)W<
YytO*^e}}
/** '9@} =pE
* @author treeroot %QYW0lE
* @since 2006-2-2 mcO/V-\5'
* @version 1.0 LkvR]^u0
*/ ?D[9-K4Vn
public class SortUtil { Lh`B5
public final static int INSERT = 1; ]c/k%]o~
public final static int BUBBLE = 2; &}}UdJ`
public final static int SELECTION = 3; @s7ZfV??
public final static int SHELL = 4; pSMF1Oy
public final static int QUICK = 5; DD$YMM
public final static int IMPROVED_QUICK = 6; b&]_5 GGc
public final static int MERGE = 7; P)D2PVD
public final static int IMPROVED_MERGE = 8; %# M=qP
public final static int HEAP = 9; <cig^B{nX
^/c v8M=
public static void sort(int[] data) { my1FW,3
sort(data, IMPROVED_QUICK); pb8sx1.j;
} #POVu|Y;h
private static String[] name={ _`|te|ccF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zH)M,+P
}; dbVMG-z8
nLvF^%P8
private static Sort[] impl=new Sort[]{ kxvzAKz~
new InsertSort(), GQ-fEIi{
new BubbleSort(), E]@$,)nC
new SelectionSort(), ?F=^& v8
new ShellSort(), D_s0)|j$cy
new QuickSort(), kfc5ra>&
new ImprovedQuickSort(), HgY [Q}7s
new MergeSort(), u([|^~H]
new ImprovedMergeSort(), yq7gBkS
new HeapSort() ZsnFuk#W
}; ~9ZW~z'
r%=}e++^%
public static String toString(int algorithm){ Fi!BXngbd
return name[algorithm-1]; (D5sJ$&E@\
} Xg4iH5!E
_dQg5CmlG
public static void sort(int[] data, int algorithm) { v~.nP} E^
impl[algorithm-1].sort(data); ]wxjd l
} ^osXM`
L|hoA9/]
public static interface Sort { HP,sNiw
public void sort(int[] data); \-`,fat
} NpPuh9e{
Sdo mG?;kV
public static void swap(int[] data, int i, int j) { 3bU(ea^e$
int temp = data; XK+" x!
data = data[j]; @'AjEl:&-_
data[j] = temp; <@448,9&
} ](@HPAG]
} |$:y8H'J