[JAVA]用Java实现的各种排序

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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; N[42al
} -}N{'S,Bp
int i1=l; HV?awc
int i2=mid+1; jf$t
for(int cur=l;cur<=r;cur++){ ".@SQgyb0
if(i1==mid+1) g`&pQ%|=
data[cur]=temp[i2++]; :V_$?S
else if(i2>r) goHr#@
data[cur]=temp[i1++]; IXg${I}_Q
else if(temp[i1] data[cur]=temp[i1++]; glv(`cQ
else | z('yy$
data[cur]=temp[i2++]; 'Lm.`U
} Az)P&*2:'`
} F]ALZxwkz
gVI*`$
} -m+2l`DLy
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改进后的归并排序: Hu'c)|~f
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package org.rut.util.algorithm.support; ?]7ITF
6f{c
import org.rut.util.algorithm.SortUtil; eFeeloH?e*
`i.f4]r
/** f|q6<n_nM
* @author treeroot Dn6DkD!
* @since 2006-2-2 O&O1O>[p1
* @version 1.0 h]D=v B
*/ OOv"h\,
public class ImprovedMergeSort implements SortUtil.Sort { \]r{73C
|MBnRR
private static final int THRESHOLD = 10; (Hn,}(3S
h{h=',o1
/* 60p1.;'/a
* (non-Javadoc) v h%\ " h
* 2'x_zMV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P, Vq/Tt
*/ j$L<9(DoR
public void sort(int[] data) { xw=B4u'z
int[] temp=new int[data.length]; A2+t`[w
mergeSort(data,temp,0,data.length-1); d?S<h`{x
} jV7q)\uu^
Sqb#U{E
private void mergeSort(int[] data, int[] temp, int l, int r) { Xajjzl\b
int i, j, k; >"Hj=?
int mid = (l + r) / 2; ]Wy V bIu
if (l == r) )*_YeT&w.
return; ]-AT(L>
if ((mid - l) >= THRESHOLD) Z6 aT%7}}
mergeSort(data, temp, l, mid); 3'']q3H
else l'o}4am
insertSort(data, l, mid - l + 1); P/y-K0u
if ((r - mid) > THRESHOLD) ^X_%e|
mergeSort(data, temp, mid + 1, r); W&*{j;e9%I
else t4JGd)r
insertSort(data, mid + 1, r - mid); J,q:
$>BP}V33
for (i = l; i <= mid; i++) { qt1#P
temp = data; L@2H>Lh35
} s@q54
for (j = 1; j <= r - mid; j++) { zcNV<tx
temp[r - j + 1] = data[j + mid]; (ncfR
} T2Vj&EA@
int a = temp[l]; F_-yT[i
int b = temp[r]; =-q)I[4#
for (i = l, j = r, k = l; k <= r; k++) { =djzE`)0
if (a < b) { N7M^
data[k] = temp[i++]; Dnp^yqz*
a = temp; .oe,#1Qh{
} else { R]r~TJ o
data[k] = temp[j--]; }U(^QB
b = temp[j]; ]>AW
} r`&ofk1K
} "7aFVf
} 9u)h$VC
Og&2,`Jb
/** OIoAqt
* @param data /qp`xJ
* @param l $rlIJwqn
* @param i X;0EgIqh3
*/ Tru`1/ 7I
private void insertSort(int[] data, int start, int len) { !BY=HFT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GV2}K <s
} q&N&n%rbm
} x7*}4>|W,I
} \fKv+
} SKS[Lf
F0|T%!FB>%
堆排序： 'WOWm$2
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package org.rut.util.algorithm.support; eIEcj<f
Qv?jo(]
import org.rut.util.algorithm.SortUtil; =uvv|@Z
J L Z
/** \Js9U|lY
* @author treeroot =X1$K_cN
* @since 2006-2-2 $DQ -.WI
* @version 1.0 gz88$BT
*/ (&x[>):6?
public class HeapSort implements SortUtil.Sort{ #?-W.
#F9$"L1Hg
/* (non-Javadoc) @-7K~in?^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1X{A}9nA
*/ "RG.vo7b
public void sort(int[] data) { &{ f5F7E@
MaxHeap h=new MaxHeap(); FIS-xpv$
h.init(data); ~pw_*AN
for(int i=0;i h.remove(); d_yqmx?w
System.arraycopy(h.queue,1,data,0,data.length); bcZHFX
} <h;P<4JX
%"z W]
private static class MaxHeap{ J7$=f~$
G%>[I6G
void init(int[] data){ x7/2e{p uu
this.queue=new int[data.length+1]; p\,lbrv
for(int i=0;i queue[++size]=data; EU\1EBT^
fixUp(size); *$s)p>
} eHjR/MMr_
} [&39Yv.k,7
`^6}Dn
private int size=0; p]>bN
d82IEhZ#
private int[] queue; nyDqR#t
~{N|("nB
public int get() { 7i'vAOnw^
return queue[1]; lE`ScYG
} dXOjaS# ~
{6KU.'#iF
public void remove() { 5i#B?+Y
SortUtil.swap(queue,1,size--); c8yD-U/-
fixDown(1); P EbB0GL
} KL|B| u
file://fixdown sX=!o})0
private void fixDown(int k) { CtE".UlCA
int j; zL_X?UmV
while ((j = k << 1) <= size) { d~n+Ds)%F
if (j < size %26amp;%26amp; queue[j] j++; 6\]-J*e>
if (queue[k]>queue[j]) file://不用交换 Pjx9@i
break; Gis'IX(
SortUtil.swap(queue,j,k); 4RzG3CJdS
k = j; sC}/?^q
} -OziUM1qs
} fZGKVxo"
private void fixUp(int k) { ZHB'^#b
while (k > 1) { * T~sR'K+|
int j = k >> 1; 'N}Wo}1r
if (queue[j]>queue[k]) 5H',Bm4-
break; n XQg(!
SortUtil.swap(queue,j,k); i?a]v 5
k = j; cJty4m-
} =N3~2=g~A
} '-*r&:
,= PDL
} 69L s"e
mg3jm
} !KF;Z|_(I
uIba{9tM"P
SortUtil： Ea3tF0{
[Z[)hUXE?
package org.rut.util.algorithm; %ZxKN;
H37Z\xS
import org.rut.util.algorithm.support.BubbleSort; 3C[;2
import org.rut.util.algorithm.support.HeapSort; |l~ADEg
import org.rut.util.algorithm.support.ImprovedMergeSort; k'\RS6M`L
import org.rut.util.algorithm.support.ImprovedQuickSort; !YoKKG~_0
import org.rut.util.algorithm.support.InsertSort; :3G9YjzC}
import org.rut.util.algorithm.support.MergeSort; LZ@^ A]U
import org.rut.util.algorithm.support.QuickSort; h&Sl8$jVp
import org.rut.util.algorithm.support.SelectionSort; _}\&;
import org.rut.util.algorithm.support.ShellSort; F )tNA?p)
D2hvf^g'*
/** 2ru6bIb;
* @author treeroot !cq4+0{O;&
* @since 2006-2-2 Sj*H4ZHD<&
* @version 1.0 <^&'r5H
*/ |n~v_V2.0
public class SortUtil { TX 87\W.
public final static int INSERT = 1; Wqqo8Y~fq
public final static int BUBBLE = 2; %Wc-.ER
public final static int SELECTION = 3; EXzY4D ^
public final static int SHELL = 4; 4C2 Dwj
public final static int QUICK = 5; NN$`n*;l
public final static int IMPROVED_QUICK = 6; I?:V EN:
public final static int MERGE = 7; Lf,gS*Tg?
public final static int IMPROVED_MERGE = 8; kj[[78
public final static int HEAP = 9; E>[~"~x"pV
m]%cNxS
public static void sort(int[] data) { IEA[]eik>
sort(data, IMPROVED_QUICK); v:+se6HY?p
} :')<|(Zy
private static String[] name={ [IYs4Y5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K[9<a>D`
}; 3)7'dM
CUtk4;^y#
private static Sort[] impl=new Sort[]{ *zx;81X=
new InsertSort(), ;uJVY)7a
new BubbleSort(), \GkcK$Y
new SelectionSort(), 6D+9f{~r
new ShellSort(), t2E_y6
new QuickSort(), c]O4l2nCL
new ImprovedQuickSort(), Rbl(oj#
new MergeSort(), </}[x2w?]
new ImprovedMergeSort(), 1k7E[G~G|
new HeapSort() isN"7y|r:X
}; UOwj"#
b :+ X3
public static String toString(int algorithm){ n b{8zo
return name[algorithm-1]; |?0C9
} g,1\Gj%y
Gh< r_O~L3
public static void sort(int[] data, int algorithm) { ;<*VwXJR
impl[algorithm-1].sort(data); Ufk7%`
} `,|7X]%b
KSexG:Xb
public static interface Sort { +Gjy%JFp
public void sort(int[] data); ](O!6_'d
} 's9)\LS>p
S5XFYQ
public static void swap(int[] data, int i, int j) { Rk'pymap
int temp = data; Coyop#q#"{
data = data[j]; "B\qp"N
data[j] = temp; 6dNo!$C^
} mjw:Z,
} LsmC/+7r$1