[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; 7H@Cy}a
} laIC}!
int i1=l; %nK15(
int i2=mid+1; x[,wJzp\6
for(int cur=l;cur<=r;cur++){ 6T aT_29
if(i1==mid+1) */@bNT9BgO
data[cur]=temp[i2++]; wBaFC\CW
else if(i2>r) pJ@DHj2@
data[cur]=temp[i1++]; Kps GQM
else if(temp[i1] data[cur]=temp[i1++]; lKD<
else x'PjP1
data[cur]=temp[i2++]; rzY@H }u
} jjlCi<9CQ^
} ;@UX7NA
%QcG^R
} t7`Pw33#kY
7]+'%Uwu)
改进后的归并排序: qSs^}eN
N`^W*>XB
package org.rut.util.algorithm.support; ${H&Q*
BN>$LL
import org.rut.util.algorithm.SortUtil; ?^A:~"~
9YsO+7[
/** `e69kBAm
* @author treeroot #~qp8 w
* @since 2006-2-2 {xx;zjt%}}
* @version 1.0 ]3cf}Au
*/ %3B>1h9N
public class ImprovedMergeSort implements SortUtil.Sort { ?;QKe0I^
xRZT
private static final int THRESHOLD = 10; xaaxj
N=q29JU
/* w)c#ZJHG
* (non-Javadoc) m<HjL
* @g5]w&o_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !ef)Ra-W
*/ 2PW3S{Dt
public void sort(int[] data) { ^mb*w)-p?
int[] temp=new int[data.length]; :fQ*'m,
mergeSort(data,temp,0,data.length-1); 43]&SXprH
} \) ONy9
DcM+K@1E4^
private void mergeSort(int[] data, int[] temp, int l, int r) { ^]K)V
int i, j, k; 1j-i nj`
int mid = (l + r) / 2; YLd%"H $n
if (l == r) I!#^F1p1
return; &BR?;LD
if ((mid - l) >= THRESHOLD) Bd[}A9O[
mergeSort(data, temp, l, mid); 89dC bF3b
else LKG|S<s
insertSort(data, l, mid - l + 1); !ry+ r!"
if ((r - mid) > THRESHOLD) bhT]zsBK
mergeSort(data, temp, mid + 1, r); OH~qJ<
else xef7mx
insertSort(data, mid + 1, r - mid); 'hWRwP|
j>M%?Tw
for (i = l; i <= mid; i++) { QrA+W\=_`y
temp = data; :S2MS{>Mo
} >FhBl\oIi
for (j = 1; j <= r - mid; j++) { Y'R1\Go-
temp[r - j + 1] = data[j + mid]; @~HD<K
} &(7Io?
int a = temp[l]; j+_75t`AZ
int b = temp[r]; <:o><f+
for (i = l, j = r, k = l; k <= r; k++) { p.olXP
if (a < b) { ?Fw/c0
data[k] = temp[i++]; s os&
a = temp; r}bKVne
} else { hR{Zh>
data[k] = temp[j--]; EeJ]> 1
b = temp[j]; ,B!Qv3bn
} zt6ep=
} i>}z$'X
} ?a(3~dh|
4v$AM8/o
/** c9 c Nlp
* @param data f{oWd]eAhb
* @param l a#=-Aj-
* @param i :gC2zv
*/ c i>=45@J
private void insertSort(int[] data, int start, int len) { }+1oD{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rG6/h'!|
} T~E83Jw
} e^TF.D?RS
} 6h%(0=^
} N0f}q1S<-A
g<Xwk2_=g
堆排序： I 3PnyNZ
}z#8vE;
package org.rut.util.algorithm.support; :h@:F7N _
?9cy5z[
import org.rut.util.algorithm.SortUtil; b :00w["
JZ [&:
/** L`v,:#Y
* @author treeroot I(SE)%!%S
* @since 2006-2-2 |)?T([
* @version 1.0 U$}]zaB
*/ HN+z7Q8hH
public class HeapSort implements SortUtil.Sort{ U@WT;:.T
i^(<E0vS
/* (non-Javadoc) oZCO$a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HYS7=[hv6
*/ 5l#)tX.by
public void sort(int[] data) { |rQ;|+.
MaxHeap h=new MaxHeap(); "fdG5|NJe
h.init(data); {H74`-C)W
for(int i=0;i h.remove(); <jF<_j
System.arraycopy(h.queue,1,data,0,data.length); n>'}tT)U
} #XZ?,neY
\=JKeL|6[S
private static class MaxHeap{ ' BpRiN
R0WJdW#
void init(int[] data){ "d'@IN
this.queue=new int[data.length+1]; eJ'ojc3
for(int i=0;i queue[++size]=data; jiat5
fixUp(size); d {4br
} =z+zg^wsT
} OB%y'mo7]
'Tn$lh
private int size=0; ]So%/rOvX
Qa=;Elp:[
private int[] queue; })Jp5vv
_]g6 3q
public int get() { s$;v )w$
return queue[1]; UZ$p wjC
} -9mh|&z`
BshS@"8r
public void remove() { 4{TUoI6ii
SortUtil.swap(queue,1,size--); rlq8J/0/+
fixDown(1); .dV!du
} 6O}r4*
file://fixdown *7ox_ R@
private void fixDown(int k) { P&K~wP]
int j; Rs dACP
while ((j = k << 1) <= size) { b3ZPlLx6
if (j < size %26amp;%26amp; queue[j] j++; oKUJB.PF
if (queue[k]>queue[j]) file://不用交换 J GdVSjNC
break; V>hy5hDpH
SortUtil.swap(queue,j,k); Kxq~,g=t
k = j; M1:m"#=
} a)]N#gx
} /CP1mn6H
private void fixUp(int k) { :\ S3[(FV
while (k > 1) { iH2|w
int j = k >> 1; {pqm&PB04
if (queue[j]>queue[k]) 8r5j~Df
break; %}@^[E)
SortUtil.swap(queue,j,k); =8]'/b
k = j; |cH\w"DcXw
} <B)lV'!Bd
} WVVqH_
b|EZ;,i
} MDRSI g
o_cj-
} #8'%CUF*<8
T"$"`A"
SortUtil： wi!Ml4Sb
1\1o65en
package org.rut.util.algorithm; :)+cI?\#
wFh{\
import org.rut.util.algorithm.support.BubbleSort; 5)}xqE"x
import org.rut.util.algorithm.support.HeapSort; ^OUkFH;dG?
import org.rut.util.algorithm.support.ImprovedMergeSort; {W0@lMrD
import org.rut.util.algorithm.support.ImprovedQuickSort; | #,b1|af
import org.rut.util.algorithm.support.InsertSort; JI.ad_IR
import org.rut.util.algorithm.support.MergeSort; "UE'dWz
import org.rut.util.algorithm.support.QuickSort; >LjvMj ]
import org.rut.util.algorithm.support.SelectionSort; VBOq~>V6(v
import org.rut.util.algorithm.support.ShellSort; -IPc;`<
J=() A+
/** D.RHvo~6
* @author treeroot 7.]ZD`"Bb
* @since 2006-2-2 x;ujR<
* @version 1.0 *F=wMWa
*/ t.NG]ejZ
public class SortUtil { <#:"vnm$j
public final static int INSERT = 1; @L`t/OD
public final static int BUBBLE = 2; @n<WM@|l
public final static int SELECTION = 3; 4rv3D@E
public final static int SHELL = 4; "}EydG"=
public final static int QUICK = 5; sURHj&:t|
public final static int IMPROVED_QUICK = 6; Dk:Zeo]+my
public final static int MERGE = 7; ndN8eh:OR
public final static int IMPROVED_MERGE = 8; P\SE_*&
public final static int HEAP = 9; 1h|JKu0
QGfU:
public static void sort(int[] data) { "",V\m
sort(data, IMPROVED_QUICK); -8g ;t3z
} qW),)i
private static String[] name={ UAa2oY&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2uz<n}IV
}; ceAK;v o
NFsMc0{
private static Sort[] impl=new Sort[]{ Si!W@Jm
new InsertSort(), oMcX{v^"
new BubbleSort(), 74QWGw`,
new SelectionSort(), 'R= r9_%
new ShellSort(), b bX2D/
new QuickSort(), G.1pg]P!
new ImprovedQuickSort(), \#
new MergeSort(), +\SbrB P
new ImprovedMergeSort(), (m})V0/`
new HeapSort() ]e 81O#t3
}; yjc:+Y{5'
Q']:k}y
public static String toString(int algorithm){ \3Ys8umKq
return name[algorithm-1]; |0BmEF
} ,0;E_i7
t/pHdxX*C7
public static void sort(int[] data, int algorithm) { az\;D\\
impl[algorithm-1].sort(data); V\^?V|
} 19h8p>Sx0
F(:+[$)
public static interface Sort { ` Y"Rh[C
public void sort(int[] data); ^<7)w2ns
} pJ1GB
++BVn[1
public static void swap(int[] data, int i, int j) { xqX~nV#TB
int temp = data; @zW'!Ol
data = data[j]; >cQ*qXI0
data[j] = temp; f?[IwA`
} lhKd<Y"
} =k'3rm*ld