[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; t-_#Q bzE{
} f,|QAj=a
int i1=l; MzcB3pi
int i2=mid+1; &a.']!$^"
for(int cur=l;cur<=r;cur++){ M9gOoYf,~
if(i1==mid+1) y)P&]&"?
data[cur]=temp[i2++]; nt7|f,_J
else if(i2>r) ;:P7}v fz!
data[cur]=temp[i1++]; d>UnJ)V}
else if(temp[i1] data[cur]=temp[i1++]; R0{Qy*YQ`
else !6lOIgn
data[cur]=temp[i2++]; ^D>fis
} pg+b[7
} '?5S"??
+6 ho)YL
} 2zhn`m
^[#=L4
改进后的归并排序: fTBVvY4(
k!&:(]
package org.rut.util.algorithm.support; i&JpM]N
+vf:z?I8
import org.rut.util.algorithm.SortUtil; YUCC*t
<P-$RX
/** Q |%-9^
* @author treeroot C ck#Y
* @since 2006-2-2 yX`#s]M
* @version 1.0 n[|6khOL-
*/ q]K'p,'
public class ImprovedMergeSort implements SortUtil.Sort { "rsSW3_
sMP:sCRC
private static final int THRESHOLD = 10; #00D?nC
^;+[8:Kb
/* K!p,x;YX
* (non-Javadoc) R }1W
* 0*/kGvw`i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +,z)#
*/ Y17hOKc`
public void sort(int[] data) { 8&%Cy'TIz4
int[] temp=new int[data.length]; 7#ofNH J
mergeSort(data,temp,0,data.length-1); ZNi +Aw$u
} +>!V]S
SnW7x
private void mergeSort(int[] data, int[] temp, int l, int r) { LX\)8~dp
int i, j, k; TKo<~?
int mid = (l + r) / 2; !.*iw k`
if (l == r) L!,d"wuD
return; 2L:$aZ
if ((mid - l) >= THRESHOLD) NEw$q4
mergeSort(data, temp, l, mid); ~cIl$b
else "kU]
insertSort(data, l, mid - l + 1); 1DqX:WM6
if ((r - mid) > THRESHOLD) h/HHKn
mergeSort(data, temp, mid + 1, r); >k;p.Pay%
else \%TyrY+`K
insertSort(data, mid + 1, r - mid); \^0!|
=G4u#t)
for (i = l; i <= mid; i++) { *1$
temp = data; P_&p=${
} nM8[
for (j = 1; j <= r - mid; j++) { *GJ:+U&m[
temp[r - j + 1] = data[j + mid]; e\D| o?v
} U7h(-dV
int a = temp[l]; a~opE!|m
int b = temp[r]; P#MK
for (i = l, j = r, k = l; k <= r; k++) { &<Zdyf?[Ou
if (a < b) { aBxiK[[`
data[k] = temp[i++]; ]ENK8bW
a = temp; s7l23*Czl
} else { +Ofa#^5);K
data[k] = temp[j--]; <bP#H
b = temp[j]; FqZgdmwR
} M?$ZJ-
} oxzq!U
} /P:EWUf'
2)9r'ai?a
/** o/^1Wm=
* @param data :^#vxdIC?
* @param l )c+k_;t'+
* @param i ;|HL+je;Z
*/ Z7z]2v3}c
private void insertSort(int[] data, int start, int len) { 8I.VJ3Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,F9nDF@)
} wXbsS)#/
} ugLlI2 nJ
} Gq1)1
} r[pF^y0
Da_()e[9p
堆排序： 9->q|E4
y`So&:1
package org.rut.util.algorithm.support; mp1ttGUtM
QIK 9
import org.rut.util.algorithm.SortUtil; Qnt5HSSt
`*_CElpP"
/** uR:rO^
* @author treeroot ]C!?HQ{bsf
* @since 2006-2-2 z:}nBCmLV
* @version 1.0 z_&P?+"Df
*/ S-c ^eLzQ
public class HeapSort implements SortUtil.Sort{ }`_(<H
2hq\n<
/* (non-Javadoc) cP rwW6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vFhz!P~
*/ t,<UohL|z
public void sort(int[] data) { (>7>3
MaxHeap h=new MaxHeap(); >bIF>9T
h.init(data); Y3rt5\!
for(int i=0;i h.remove(); 9 <\`nm
System.arraycopy(h.queue,1,data,0,data.length); !YE zFU`L
} # yN*',I&
!%[S49s
private static class MaxHeap{ ].mqxf
o35fifM`
void init(int[] data){ =J/FJb
this.queue=new int[data.length+1]; [Y/:@t"2y
for(int i=0;i queue[++size]=data; zk}{ dG^M:
fixUp(size); L;/n!k.A
} K0Tg|9
} &%,DZA`
+}JM&bfK
private int size=0; J=H)JH3
Q2QY* A
private int[] queue; f~ U.a.Fb
izwUS!5e
public int get() { 8ObeiVXf)
return queue[1]; f^b K=#
} ^sClz*%?
q>s`uFRg(
public void remove() { 27#5y_ `
SortUtil.swap(queue,1,size--); *y]+dK&-
fixDown(1); RN9;kB)c
} RUo9eQIPD
file://fixdown 93o;n1rS
private void fixDown(int k) { OH'ea5xq
int j; @~:8ye
while ((j = k << 1) <= size) { |"Z{I3Umg
if (j < size %26amp;%26amp; queue[j] j++; |.U)ll(c
if (queue[k]>queue[j]) file://不用交换 s([dGD$i
break; VW<0Lt3
SortUtil.swap(queue,j,k); (.23rVvnT@
k = j; j.|U=)E
} ,D=fFpn
} caq} &A]C
private void fixUp(int k) { tef^ShF]
while (k > 1) { QG3&p<
int j = k >> 1; !mnUdR|>(
if (queue[j]>queue[k]) vhgLcrn
break; {C3Y7<
SortUtil.swap(queue,j,k); 3yO=S0`
k = j; KoBW}x9Jp
} DuF"*R~et
} m_7 nz!h
dh -,E
} d)ahF[82
qJv[MBjk3B
} r'4:)~]s
eJ@~o{,?>
SortUtil： yVJ%+d:6
zT9JBMNE:
package org.rut.util.algorithm; j*R,m1e8
K8[DZ)rO;Z
import org.rut.util.algorithm.support.BubbleSort; 1hmc,c
import org.rut.util.algorithm.support.HeapSort; )!W45"l-3M
import org.rut.util.algorithm.support.ImprovedMergeSort; z`3( ,V
import org.rut.util.algorithm.support.ImprovedQuickSort; l67Jl"v
import org.rut.util.algorithm.support.InsertSort; diT=x52
import org.rut.util.algorithm.support.MergeSort; q|(W-h+
import org.rut.util.algorithm.support.QuickSort; (<c7<_-H
import org.rut.util.algorithm.support.SelectionSort; =|U@
import org.rut.util.algorithm.support.ShellSort; TzG]WsY_
o l ({AYB
/** sen=0SB/
* @author treeroot zI;0&
* @since 2006-2-2 WF2-$`x
* @version 1.0 ~r*P]*51x
*/ &^.57]
public class SortUtil { z\!K<d"Xv
public final static int INSERT = 1; Dr#c)P~Wd
public final static int BUBBLE = 2; T)iW`vZg8
public final static int SELECTION = 3; S4o$t-9l
public final static int SHELL = 4; uGP(R=H
public final static int QUICK = 5; _aS;!6b8W
public final static int IMPROVED_QUICK = 6; n.}T1q|l
public final static int MERGE = 7; x3G:(YfO
public final static int IMPROVED_MERGE = 8; +[-i%b3q
public final static int HEAP = 9; ,H kj1x
zj{s}*
public static void sort(int[] data) { Yl^mAS[w&
sort(data, IMPROVED_QUICK); dJk9@u
} ,!QV>=
private static String[] name={ ;0%OB*lcgE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LlYTv%I
}; 2I'~2o
gzn^#3b
private static Sort[] impl=new Sort[]{ a2@c%i
new InsertSort(), K7)kS
new BubbleSort(), k;^ :
new SelectionSort(), uE5X~
new ShellSort(), e":G*2a
new QuickSort(), vGd1w%J-
new ImprovedQuickSort(), &, a3@i
new MergeSort(), 9$*s8}|
new ImprovedMergeSort(), Dl\`
new HeapSort() b1?xeG#
}; =d`5f@'rl
*f+: <=i
public static String toString(int algorithm){ /bRg?Q
return name[algorithm-1]; @x&P9M0g
} E,[xUz"
&(pjqV
public static void sort(int[] data, int algorithm) { Lxl_"kG
impl[algorithm-1].sort(data); I:j3sy
} _8?o'<!8?^
=r. >N\
public static interface Sort { /F/;G*n
public void sort(int[] data); XP?rOOn
} ssQ BSbx
%yS3&Ju
public static void swap(int[] data, int i, int j) { 3251Vq %
int temp = data; H*I4xT@
data = data[j]; G;iEo4\?
data[j] = temp; y'C-[nk
} Tny>D0Z#
} &:#h$`4