[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; ?VU(Pq*`
} VvbFp
int i1=l; }!#gu3
int i2=mid+1; NMO-u3<6.
for(int cur=l;cur<=r;cur++){ Q\ ^[!|
if(i1==mid+1) %b.UPS@I
data[cur]=temp[i2++]; FUK3)lT
else if(i2>r) k#TYKft
data[cur]=temp[i1++]; k`HP"H
else if(temp[i1] data[cur]=temp[i1++]; .ujT!{>v/
else rtJl _0`
data[cur]=temp[i2++]; `pZs T ^G[
} 9&%fq)gS
} (oK^c-x
uNbH\qd=
} Sgb*tE)T
u.pxz8
改进后的归并排序: (<t_Pru
8?t"C_>*e
package org.rut.util.algorithm.support; `;,Pb&W~
3XiO@jzre
import org.rut.util.algorithm.SortUtil; M_0zC1
F-(dRSDNM
/** ^_I} x)i*@
* @author treeroot R`Aj|C z
* @since 2006-2-2 kpwt]]e*
* @version 1.0 \ A1uhHP!
*/ G |*(8r()
public class ImprovedMergeSort implements SortUtil.Sort { M x5`yT7
Y-piL8Xc
private static final int THRESHOLD = 10; MJ<Jb,D1
1PaUI#X"2F
/* :H6FPV78
* (non-Javadoc) a~h:qpgc
* $VG*q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1:C:?ZC#c
*/ X#xFFDzN
public void sort(int[] data) { LL^q1)o
int[] temp=new int[data.length]; Hi!Jj
mergeSort(data,temp,0,data.length-1); zxb/
} ~Vh(6q.oT
{P9J8@D
private void mergeSort(int[] data, int[] temp, int l, int r) { @YvOoTyb
int i, j, k; ivO/;)=t
int mid = (l + r) / 2; Rx07trfN
if (l == r) dCYCHHHF
return; 0oA{Jix
if ((mid - l) >= THRESHOLD) idc`p?XP
mergeSort(data, temp, l, mid); v7
else =-cwXo{Q.O
insertSort(data, l, mid - l + 1); {3a&1'a0g
if ((r - mid) > THRESHOLD) pY)5bSA
mergeSort(data, temp, mid + 1, r); g3n'aD@'x
else #$~ba%t9%
insertSort(data, mid + 1, r - mid); a`9L,8Ve
))D:8l@
for (i = l; i <= mid; i++) { h+.{2^x
temp = data; ! hd</_#
} Eh</? Qv\
for (j = 1; j <= r - mid; j++) { j*@l"V>~
temp[r - j + 1] = data[j + mid]; Kr'f-{
} IH48|sa
int a = temp[l]; mpC`Yk
int b = temp[r]; nL@KX>
for (i = l, j = r, k = l; k <= r; k++) { i!2TH~zl
if (a < b) { l:;PXy6)
data[k] = temp[i++]; (GnuWc\p
a = temp; l5%G'1w#,j
} else { ]=rht9),"
data[k] = temp[j--]; _!;Me )C
b = temp[j]; O-]mebTvw
} <tpmUA[]
} NqHy%'R
} ?SQE5Z
#?MY&hdU9
/** mvW%
* @param data exh/CK4;
* @param l y4Z&@,_{
* @param i vr#+0:|
*/ dG QG!l+>
private void insertSort(int[] data, int start, int len) { -50HB`t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H>Q%"|
} c0c|z Ym
} D.D$#O_n.S
} jdKOb
} G)#$]diNuX
H|ozDA
堆排序： nMDxH$O
r`&-9"+
package org.rut.util.algorithm.support; M7f;Pa
rn DCqv!'P
import org.rut.util.algorithm.SortUtil; ERwHLA
Yw5'6NU
/** 5vo.[^ty
* @author treeroot *vgl*k?)
* @since 2006-2-2 s &Dg8$
* @version 1.0 KKA~#iCk
*/ iu**`WjI\
public class HeapSort implements SortUtil.Sort{ }'r[m5T
!$2Z-!
/* (non-Javadoc) 8u[-'pV!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GdB.4s^
*/ PcB_oG g
public void sort(int[] data) { [{4MR%--
MaxHeap h=new MaxHeap(); 3mPjpm
h.init(data); jq'!UN{
for(int i=0;i h.remove(); ~HQ9i%exg
System.arraycopy(h.queue,1,data,0,data.length); pEECHk
} Y_`-9'&
+q6ydb,
private static class MaxHeap{ |AZg*T3:W
j4=(H:c~E
void init(int[] data){ Lb LiB*D#s
this.queue=new int[data.length+1]; sNun+xsf^
for(int i=0;i queue[++size]=data; A+@&"
fixUp(size); UR:aD_h
} dr4Z5mw"E
} CctJFcEZ
:Hxv6
private int size=0; iy""(c
5s(1[(
private int[] queue; 4Llo`K4
j}b\Z9)!
public int get() { O25lLNmO
return queue[1]; tabT0
} ;Eu3[[V
y qtKy
public void remove() { Dk48@`l2
SortUtil.swap(queue,1,size--); 8p[)MiC5W^
fixDown(1); ){jla,[
} x@8a''
file://fixdown NnVnUgx
private void fixDown(int k) { G[jW<'f
int j; _X?^Cy
while ((j = k << 1) <= size) { &^4++
if (j < size %26amp;%26amp; queue[j] j++; UA|u U5Q
if (queue[k]>queue[j]) file://不用交换 QeF3qXI
break; 'vNG(h#%d
SortUtil.swap(queue,j,k); I%urz!CNE*
k = j; "Ks,kSEzu
} s&'QN=A
} <FZ@Q[RP
private void fixUp(int k) { a&vY!vx3
while (k > 1) { },|M9I0
int j = k >> 1; G@j0rnn>B
if (queue[j]>queue[k]) sVex (X
break; *hcYGLx r
SortUtil.swap(queue,j,k); I}R0q
k = j; J4Dry<
} O*#*%RL|
} 4j)tfhwd8
o.I6ulY8
} Hc`A3SMR
y( y8+ZT
} m#=z7.XrX
~Jf{4*>y
SortUtil： %.Q !oYehj
0Fu~%~#E$
package org.rut.util.algorithm; tJN<PCG6"
'(/7[tJ
import org.rut.util.algorithm.support.BubbleSort; *?MGMhE
import org.rut.util.algorithm.support.HeapSort; 3do)Vg4
import org.rut.util.algorithm.support.ImprovedMergeSort; }V\N16f
import org.rut.util.algorithm.support.ImprovedQuickSort; -lv)tHs<
import org.rut.util.algorithm.support.InsertSort; T1H"\+
import org.rut.util.algorithm.support.MergeSort; -IV]U*4
import org.rut.util.algorithm.support.QuickSort; Wl}&?v&@
import org.rut.util.algorithm.support.SelectionSort; =JmT:enV
import org.rut.util.algorithm.support.ShellSort; *z7dl5xJ
0iJue&
/** I|Gp$uq _
* @author treeroot PdvqDa8
* @since 2006-2-2 A@Dw<.&_I
* @version 1.0 rXHv`ky
*/ 4ni3kmvX
public class SortUtil { fDP$ sW
public final static int INSERT = 1; ~ar=PmYV7
public final static int BUBBLE = 2; AoyX\iqQ
public final static int SELECTION = 3; vY_-Ranj#.
public final static int SHELL = 4; &y#r;L<9
public final static int QUICK = 5; :Lz\yARpk
public final static int IMPROVED_QUICK = 6; L31|\x]
public final static int MERGE = 7; e#k<d-sf6
public final static int IMPROVED_MERGE = 8; vI@%Fg+D
public final static int HEAP = 9; Nr=d<Us9f
e zOj+vz
public static void sort(int[] data) { n..g~$k
sort(data, IMPROVED_QUICK); .c$316
} QMZ)-ty"
private static String[] name={ I&YSQK:b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \W`w` o
}; 5+wAzVA
95V@X ^Ee
private static Sort[] impl=new Sort[]{ ^53r/V}%
new InsertSort(), Kde9 $
new BubbleSort(), nb>7UN.9
new SelectionSort(), =ha{Ziryo
new ShellSort(), &/Q0
new QuickSort(), Ggb5K8D*
new ImprovedQuickSort(), zi3\63D3eO
new MergeSort(), k|!EDze43?
new ImprovedMergeSort(), *H|M;G
new HeapSort() 9tqF8pb7v
}; to$h2#i_
~appY Av
public static String toString(int algorithm){ 6!(@@^7{*
return name[algorithm-1]; WH\))y-
} jNC4_q&
:*2ud(
public static void sort(int[] data, int algorithm) { lO_UPC\@fw
impl[algorithm-1].sort(data); BGu?<bET
} *~x/=.}
)d>!"JB-
public static interface Sort { 5hy""i
public void sort(int[] data); Dv/WE>?Aw
} NSDv;|f
*v3]}g[<
public static void swap(int[] data, int i, int j) { I'0@viF"Nx
int temp = data; yYH0v7vx+
data = data[j]; e[#j.|m
data[j] = temp; >#y^;/bb
} PxS8 n?y
} I=NZokfS