[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; @~&|BvK% \
} ydMhb367|
int i1=l; kzVK%[/
int i2=mid+1; ]E.\ |I(
for(int cur=l;cur<=r;cur++){ {]%7-4E
if(i1==mid+1) *x_e] /}
data[cur]=temp[i2++]; Gzp*Vr
else if(i2>r) g'Wr+(A_
data[cur]=temp[i1++]; 2UopGxrPKw
else if(temp[i1] data[cur]=temp[i1++]; e~SRGyIww
else hY/qMK5
data[cur]=temp[i2++]; *TrpW?]Y&
} WD5jO9Oai
} ^9]g5.z:
nt@uVwfQ
} Uu|2!}^T
ps^["3e
改进后的归并排序: .@\(ay
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package org.rut.util.algorithm.support; \TLfLqA
{L \TO,
import org.rut.util.algorithm.SortUtil; -v:3#9uX)
EN__C$
/** <nK@+4EH"o
* @author treeroot VtMnLFMw
* @since 2006-2-2 %0({MU
* @version 1.0 I+`>e*:@W
*/ M,cz7,
public class ImprovedMergeSort implements SortUtil.Sort { T+S\'f\
eep/96G ?
private static final int THRESHOLD = 10; nGsFt.
qiq=v)
/* .J=QWfqt
* (non-Javadoc) F&C< = l\X
* 1@}<CWE9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [;l;kom
*/ 7+Nl)d:CJ
public void sort(int[] data) { WEoD?GLS8
int[] temp=new int[data.length]; 6B Hdc
mergeSort(data,temp,0,data.length-1); b&]z^_m)
} flz7{W
LoOw]@>
private void mergeSort(int[] data, int[] temp, int l, int r) { FbH@qHSH
int i, j, k; =4L%A=]`
int mid = (l + r) / 2; r9<#R=r)}J
if (l == r) >"z`))9
return; @i#=1)Ze
if ((mid - l) >= THRESHOLD) P)~olrf
mergeSort(data, temp, l, mid); i[wnG)
else b8[ ayy
insertSort(data, l, mid - l + 1); L>lxkq8!Q
if ((r - mid) > THRESHOLD) ys:F
mergeSort(data, temp, mid + 1, r); I|2dV9y
else '}OAl
insertSort(data, mid + 1, r - mid); fp`m>} -
Z`Jt6QgW
for (i = l; i <= mid; i++) { p9!jM\(
temp = data; h A'>
} L-m' #
for (j = 1; j <= r - mid; j++) { n\$.6 _@x
temp[r - j + 1] = data[j + mid]; k4!p))ql
} '5A&c(
int a = temp[l]; K;`W4:,
int b = temp[r]; )% gU
for (i = l, j = r, k = l; k <= r; k++) { 0IHAoV60
if (a < b) { WDr=+=Zj
data[k] = temp[i++]; MM&qLAa"f
a = temp; U} Pr1
} else { K.}jyhKIKi
data[k] = temp[j--]; +x?8\
b = temp[j]; LaL{ ^wP
} q4vHsy36
} Cd_H<8__
} @Hr1.f
B-|C%~fe
/** :3b\pEO9\
* @param data %/}d'WJR
* @param l ?\<Kb|Q
* @param i #UvWS
*/ T:!H^
private void insertSort(int[] data, int start, int len) { d_&~^*>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $J]NWgXl@
} ,o0[^-b<
} >keYx<1
} Ss1&fZoj
} }_Y\6fcd
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堆排序： =A_{U(>
Bi0&F1ZC!
package org.rut.util.algorithm.support; @-ir
Ng*O/g`%L
import org.rut.util.algorithm.SortUtil; m$g{&
N0YJ'.=8,
/** )X6I#q8
* @author treeroot w-Q=oEt
* @since 2006-2-2 B"t4{1/
* @version 1.0 5X^`qUSv
*/ A8ClkLC;I
public class HeapSort implements SortUtil.Sort{ aOEW$%
.G/RQn]x}
/* (non-Javadoc) Xx^v%[!`+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iH-(_$f;
*/ QD 0p
public void sort(int[] data) { kvt^s0T8Q
MaxHeap h=new MaxHeap(); T1RICIf1F
h.init(data); .0dx@Sbv
for(int i=0;i h.remove(); tU-jtJ
System.arraycopy(h.queue,1,data,0,data.length); '~xjaa;.
} hM8FN
v5L#H=P
private static class MaxHeap{ -)e(Qt#ewl
]/Cu,mX
void init(int[] data){ {dvsZJj
this.queue=new int[data.length+1]; sb%l N
for(int i=0;i queue[++size]=data; W"s)s
fixUp(size); Z}>+!Z
} KwxJ{$|xH
} tk+t3+
%;O# y3,
private int size=0; %z["TVH
(y2P."
private int[] queue; V&d?4i4/Q
/ KKA/
public int get() { W\z<pP
return queue[1]; (9+N_dLx~P
} LhKUZX,P8
^K!R4Y4t
public void remove() { l i2/"~l
SortUtil.swap(queue,1,size--); t=dZM}wj_\
fixDown(1); dg;E,'e_ p
} wKy4Ic+RV
file://fixdown <}AmzeHr+
private void fixDown(int k) { .Mzrj{^Y
int j; Le,+jm
while ((j = k << 1) <= size) { o6S`7uwJ*/
if (j < size %26amp;%26amp; queue[j] j++; +/Vzw
if (queue[k]>queue[j]) file://不用交换 ;}AcyVV
break; &fifOF#[e
SortUtil.swap(queue,j,k); oX[I4i%G
k = j; fU4{4M+9"
} cONfHl{
} cP8@'l@!
private void fixUp(int k) { ZHc;8|}
while (k > 1) { GC~N$!*
int j = k >> 1; _2Fa.gi
if (queue[j]>queue[k]) ZmJHLn[B
break; Bh!J&SM:
SortUtil.swap(queue,j,k); .t{?doOT
k = j; Redxg.P
} +,bgOq\aG
} IV$2`)[A&X
l,1.6
} &/lmg!6
, -S n
} JPS<e*5
w7h=vy n?
SortUtil： kA&ul
Z!qF0UDj
package org.rut.util.algorithm; r#K"d
8__C T
import org.rut.util.algorithm.support.BubbleSort; $6\W8v
import org.rut.util.algorithm.support.HeapSort; BGVy \F<
import org.rut.util.algorithm.support.ImprovedMergeSort; DR#[\RzNI
import org.rut.util.algorithm.support.ImprovedQuickSort; lpeo^Y}N
import org.rut.util.algorithm.support.InsertSort; 0B~Q.tyP
import org.rut.util.algorithm.support.MergeSort; e\>g@xE%
import org.rut.util.algorithm.support.QuickSort; <2RxyoDL6
import org.rut.util.algorithm.support.SelectionSort; UHUO9h
import org.rut.util.algorithm.support.ShellSort; 9TW
+)K yG
/** Bn{0-5nj
* @author treeroot MBH/,Yd
* @since 2006-2-2 Fgg4QF
* @version 1.0 &:)e
*/ {p@uj_pS
public class SortUtil { ]6{\`a
public final static int INSERT = 1; MOW {g\{\
public final static int BUBBLE = 2; - dt<w;>W
public final static int SELECTION = 3; 6 _\j_$
public final static int SHELL = 4; q! U'DDEP
public final static int QUICK = 5; QabYkL5@
public final static int IMPROVED_QUICK = 6; Gk5SG_o
public final static int MERGE = 7; xF3H\`{4x
public final static int IMPROVED_MERGE = 8; yLlAK,5P0o
public final static int HEAP = 9; C\dlQQ
S+YbsLf
public static void sort(int[] data) { Af"vSL
sort(data, IMPROVED_QUICK); >ak53Ij$
} DweWFipyPi
private static String[] name={ ?V&[U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r3b~|O^}
}; @*c) s_
"ci<W_lx
private static Sort[] impl=new Sort[]{ /aB9pD+%
new InsertSort(), C&'Y@GE5
new BubbleSort(), Kv:ih=?
new SelectionSort(), +>5 "fs$Y
new ShellSort(), XDJQO /qN
new QuickSort(), lFY;O !Y5\
new ImprovedQuickSort(), ,uP1U@Cas
new MergeSort(), f(E 'i>
new ImprovedMergeSort(), BE}qwP^
new HeapSort() 7M1*SC
}; z {J1pH_X
`'[ 7M
public static String toString(int algorithm){ cZ7b$MZ%9
return name[algorithm-1]; KV0e^c;
} \0pJ+@\T9
UmU=3et<Wj
public static void sort(int[] data, int algorithm) { 7c6-S@L
impl[algorithm-1].sort(data); )N2yhdcqI
} YAZ=-@]`\
o=_4v^
public static interface Sort { xZmKKKd0*
public void sort(int[] data); \o@b5z]e
} y\@;s?QL
TR@$$RrU
public static void swap(int[] data, int i, int j) { 3<msiCP
int temp = data; Pwz^{*u]
data = data[j]; # dxlU/*
data[j] = temp; +.HQ+`8z]
} ~%Yh`c EP
} Ye!=