[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; <5NF;
} *M$0J'-BQ
int i1=l; \>CYC|
int i2=mid+1; ~ECD`N<YF
for(int cur=l;cur<=r;cur++){ [ { bV4
if(i1==mid+1) HYD"#m'TkB
data[cur]=temp[i2++]; qIY~dQ|
else if(i2>r) 9(6I<]#
data[cur]=temp[i1++]; >2,Gy-&"0
else if(temp[i1] data[cur]=temp[i1++]; }; f#^gz'
else !<SA6m#
data[cur]=temp[i2++]; 0&/b42W
} ;PjQt=4K
} &2`Fn!m
sFQ^2PwbS
} #|*F1K
Q($Z%1S
改进后的归并排序: )hk
tI7:5Cm
package org.rut.util.algorithm.support; Y=?yhAw
hi0R.V&
import org.rut.util.algorithm.SortUtil; L+CyQq
TZ2=O<Kj
/** :'*DPB-
* @author treeroot 7vABq(
* @since 2006-2-2 ( YQWbOk
* @version 1.0 *,Za6.=
*/ w9o^s5n
public class ImprovedMergeSort implements SortUtil.Sort { e_/b2"{
j{NNSi3
private static final int THRESHOLD = 10; /Wy.>YC|
'Er:a?88l
/* ]R=,5kK3
* (non-Javadoc) mExVYp h
* 5g9; +}X;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DSt]{fl`P
*/ nzmDA6d
public void sort(int[] data) { jcI&w#re
int[] temp=new int[data.length]; :dLAs@z
mergeSort(data,temp,0,data.length-1); ds&e|VSH;
} ]ut5S>,"
w^LuIbA
private void mergeSort(int[] data, int[] temp, int l, int r) { ~i21%$
int i, j, k; i:u1s"3~
int mid = (l + r) / 2; Rr!Y3)f;
if (l == r) D<V~f B
return; v{9t]s>B
if ((mid - l) >= THRESHOLD) X`fn8~5
mergeSort(data, temp, l, mid); C&6IU8l\
else XK: 9r{r{
insertSort(data, l, mid - l + 1); M?[h0{^K
if ((r - mid) > THRESHOLD) <x&%~6j
mergeSort(data, temp, mid + 1, r); Tp0bS
else 5cEcTJL[C
insertSort(data, mid + 1, r - mid); Y_]De3:V0B
i:Zm*+Gi
for (i = l; i <= mid; i++) { $2u 'N:o
temp = data; WdnIp!
} :"l-KQ0
for (j = 1; j <= r - mid; j++) { \#rIQOPl?
temp[r - j + 1] = data[j + mid]; Vo7dAHHL
} Qu7T[<
int a = temp[l]; >P/][MT
int b = temp[r]; xY$iz)^0&
for (i = l, j = r, k = l; k <= r; k++) { Y}[c^$S
if (a < b) { <}sq?Sfq!
data[k] = temp[i++]; ;>AL`M+
a = temp; ONCnVjZ
} else { YSj+\Z$(
data[k] = temp[j--]; P1NJ^rX
b = temp[j]; .58qL-iC
} 4WE6fJ2X
} m\ddp_l
} <a[Yk 2
)x]3Zq
/** ?_ dIIQ
* @param data #Jna6
* @param l in(U:04
* @param i zLF?P3^
*/ m~dC3}e8/?
private void insertSort(int[] data, int start, int len) { 8@PX7!9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TARXx>
} (%U@3._
} ]XTu+T.aT
} Z(9u<
} 8HZs>l
lw :`M2P,
堆排序： nwN@DqO
M{$j
package org.rut.util.algorithm.support; )LdyC`S\c
.-JCwnP
import org.rut.util.algorithm.SortUtil; |Xw/E)jA
'}rRzD:
/** t#S<iBAZ
* @author treeroot ay %KE=*v
* @since 2006-2-2 N |1>ooU[
* @version 1.0 rLU/W<F8
*/ W;1|+6x
public class HeapSort implements SortUtil.Sort{ 2QNNp:`6
i@][rdhT
/* (non-Javadoc) &bhq`>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h1(j2S`:
*/ uK'&Dam
public void sort(int[] data) { !gLkJ)
MaxHeap h=new MaxHeap(); dVQ-k
h.init(data); RID]pek
for(int i=0;i h.remove(); fl;s9:<
System.arraycopy(h.queue,1,data,0,data.length); kEO7PK/
} `juLQH
-!)xQvagD.
private static class MaxHeap{ +`sv91c
gt\MS;jMa
void init(int[] data){ :d8W+|1u
this.queue=new int[data.length+1]; cv(PP-'\
for(int i=0;i queue[++size]=data; Q.Aw2
fixUp(size); <jS~ WI@
} up2+s#
} (Z}>1WRju
nkv(~ej(
private int size=0; @vMA=v7a
kqb0>rYa
private int[] queue; O8]'o*<]
OgcHS?
public int get() { {} Bf
return queue[1]; uHIiH@S
} KIeT!kmDl
5*\\J&H
public void remove() { kSc{^-<R
SortUtil.swap(queue,1,size--); ^ZM0c>ev=l
fixDown(1); 2S8P}$mM
} O,<IGO
file://fixdown O'GG Ti]e
private void fixDown(int k) { vfB2XVc
int j; KvQ,;A
while ((j = k << 1) <= size) { CAT.4GM
if (j < size %26amp;%26amp; queue[j] j++; !vn1v)6
if (queue[k]>queue[j]) file://不用交换 ^VT1vu %03
break; @h?shW=^
SortUtil.swap(queue,j,k); &/A8-:m
k = j; __@zTSVb
} <}jPXEB"
} =H8 xSJLh
private void fixUp(int k) { 4gSH(*}
while (k > 1) { b.O9ITR
int j = k >> 1; J4=_w
if (queue[j]>queue[k]) .P$IJUYO
break; I5AO?BzJ
SortUtil.swap(queue,j,k); T<-=nX
k = j; ?4CNkk=v
} Cv)/7vyB8
} (]*H[)F/
OquAql:
} 3K@@D B6
dV?5Q_}
} U6[ang'l
?4G|+yby
SortUtil： Zs2-u^3&
^O^:$nXhYy
package org.rut.util.algorithm; a4gi,pz$]
pbHsR^
import org.rut.util.algorithm.support.BubbleSort; to"'By{9
import org.rut.util.algorithm.support.HeapSort; QMo}W{D
import org.rut.util.algorithm.support.ImprovedMergeSort; qW_u
import org.rut.util.algorithm.support.ImprovedQuickSort; X~Rl 6/,
import org.rut.util.algorithm.support.InsertSort; S>q>K"j^!
import org.rut.util.algorithm.support.MergeSort; HftxS
import org.rut.util.algorithm.support.QuickSort; !}M,
import org.rut.util.algorithm.support.SelectionSort; 2}vg U$a
import org.rut.util.algorithm.support.ShellSort; WqrgRpM{
2eQdQwX
/** w>xV
* @author treeroot ]+DI.%
* @since 2006-2-2 \4ghYQ:
* @version 1.0 *pzq.#
*/ ?RFg$Z'^
public class SortUtil { K:y^OAZfV
public final static int INSERT = 1; 7?"y{R>E
public final static int BUBBLE = 2; 3}1ssU"T
public final static int SELECTION = 3; 1on'^8]0
public final static int SHELL = 4; s|bM%!$1
public final static int QUICK = 5; ,%#
public final static int IMPROVED_QUICK = 6; EA<}[4#jS
public final static int MERGE = 7; |rRG=tG_'
public final static int IMPROVED_MERGE = 8; ]7AX%EG3
public final static int HEAP = 9; lz | 64J
7@%'wy&A
public static void sort(int[] data) { Aw!gSf)
sort(data, IMPROVED_QUICK); ^]p
} /DS?}I.*]
private static String[] name={ Wx)K*9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zszs1{t
}; (y4#.vZh:
2_QN&o ~h
private static Sort[] impl=new Sort[]{ d6 _C"r
new InsertSort(), qBk``!|s]
new BubbleSort(), oCi ~P}r
new SelectionSort(), CPazEe1S
new ShellSort(), S(eQ{rSs
new QuickSort(), Ja^ 5?Ar|
new ImprovedQuickSort(), @nV5.r0W}B
new MergeSort(), !{_yaVF
new ImprovedMergeSort(), x;BbTBc>
new HeapSort() E^ h=!RW{
}; x4a:PuqmGG
6er(%4!
public static String toString(int algorithm){ )E7 FA|
return name[algorithm-1]; T9y;OG
} ZX`J8lZP
~bA,GfSn0
public static void sort(int[] data, int algorithm) { _.18z+
impl[algorithm-1].sort(data); SjcL#S($&Y
} BZ+-p5]-
w3*-^: ?j
public static interface Sort { \X}8q
public void sort(int[] data); S9Y[4*//
} nX%AeDBAT
=)<3pGO
public static void swap(int[] data, int i, int j) { #'o7x'n^
int temp = data; *8g<R
data = data[j]; ('o&Q_
data[j] = temp; @O3/3vi1
} (hZ:X)E>
} +`| *s3M