[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; ~Ra8(KocD
} q{f (T\
int i1=l; s<3M_mt
int i2=mid+1; q; C6ID`
for(int cur=l;cur<=r;cur++){ S&J5QZjC
if(i1==mid+1) \ *g3j
data[cur]=temp[i2++]; 3Lv5>[MnN
else if(i2>r) S{{wcH$n'i
data[cur]=temp[i1++]; VG50n<m9
else if(temp[i1] data[cur]=temp[i1++]; Q=#FvsF#z3
else Z=a~0&G
data[cur]=temp[i2++]; g!cW`B'
} T&Z*=ShH
} `9\^.g)
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} m)r,
j;-2)ZLm
改进后的归并排序: ]U}B~Y
J L1]auO*
package org.rut.util.algorithm.support; Gj[5ew?@
|nqN95'u+]
import org.rut.util.algorithm.SortUtil; 79h'sp6;
[N"=rY4G
/** la^K|!|
* @author treeroot mDuS-2G=D
* @since 2006-2-2 # 00?]6`z
* @version 1.0 {V8uk$
*/ i#*lK7
public class ImprovedMergeSort implements SortUtil.Sort { 7[0CVWs,
4jjo%N
private static final int THRESHOLD = 10; }n"gX>e~
BhiOV_}Hn
/* .VohW=D3
* (non-Javadoc) |M18/{
* =hI;5KF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TS=U%)Ik
*/ 0E{DO<~
public void sort(int[] data) { 7E5=Qx
int[] temp=new int[data.length]; 5Ux=5a
mergeSort(data,temp,0,data.length-1); <@0S]jy
} Q6N?cQtOT
3|EAOoWnK
private void mergeSort(int[] data, int[] temp, int l, int r) { h&~9?B
int i, j, k; 2~V"[26t
int mid = (l + r) / 2; 6(ER$
if (l == r) k(@W z>aCv
return; ]a[2QQ+g
if ((mid - l) >= THRESHOLD) J\J3'u
mergeSort(data, temp, l, mid); P=s3&NDD
else u0qTP]
insertSort(data, l, mid - l + 1); ]8<`&~a
if ((r - mid) > THRESHOLD) ZQ-6n1O
mergeSort(data, temp, mid + 1, r); x<.(fRv
else ^}J,;Zhu5
insertSort(data, mid + 1, r - mid); .;(a;f+{;
19%zcYTe
for (i = l; i <= mid; i++) { C3 BoH&
temp = data; d vo|9>
} JcfGe4
for (j = 1; j <= r - mid; j++) { ZzP&Zrm
temp[r - j + 1] = data[j + mid]; oqg +<m
} ,v?FR }v
int a = temp[l]; _'n]rQ'
int b = temp[r]; 9XUk.Nek
for (i = l, j = r, k = l; k <= r; k++) { b%0@nu4
if (a < b) { b7gN|Hw5 H
data[k] = temp[i++]; _G2)=yj]
a = temp; xP27j_*m>
} else { $-s8tc(
data[k] = temp[j--]; /wkrfYRs
b = temp[j]; MIN}5kc<
} O:imX>|u
} {]dvzoE]
} "EE(O9q
_3#_6>=M
/** $)KNpdXh
* @param data U_Q;WPJ
* @param l cxx8I
* @param i '+c@U~d*7
*/ lAo4)
private void insertSort(int[] data, int start, int len) { {CFy %
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Bv~6tj~J
} gtqtFrleG
} S@TfZ3Go|
} &MB1'~Q,hq
} ~n(LBA
0r?]b*IEK
堆排序： I$XwM
Tl+PRR6D*
package org.rut.util.algorithm.support; `P$X`;SwE
Fzn!
import org.rut.util.algorithm.SortUtil; 05 .EI)7
lwjA07i
/** 6uX,J(V,
* @author treeroot 64^l/D(
* @since 2006-2-2 7loWqZ
* @version 1.0 PI"6d)S2
*/ ='-/JH~
public class HeapSort implements SortUtil.Sort{ 5XuQQ!`
w@\4ft6d
/* (non-Javadoc) kL<HGQt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z>dvth
*/ r"t,/@`n
public void sort(int[] data) { bw!*=<
MaxHeap h=new MaxHeap(); 1Ve~P"w
h.init(data); ~B7<Yg
for(int i=0;i h.remove(); VZ7E#z+nM#
System.arraycopy(h.queue,1,data,0,data.length); *?>52 -&b
} ih|&q
,vBB". LY'
private static class MaxHeap{ &2n5m&
VJ1rU mO~
void init(int[] data){ -MORd{GF
this.queue=new int[data.length+1]; =)x+f/c]
for(int i=0;i queue[++size]=data; 1)f <
fixUp(size); >gl.ILo
} =Q6JXp
} y I[kaH"J
42:,*4t(
private int size=0; RVF<l?EI4R
/2Ok;!.
private int[] queue; def\=WyK
[+!+Yn6:
public int get() { U8</aQLGF
return queue[1]; !FvL2L
} G+\&8fi0
vYq"W%
public void remove() { kovJ9
SortUtil.swap(queue,1,size--); .&h|r>*|J
fixDown(1); Sw>,Q-32
} >4Qj+ou
file://fixdown \VypkbE+
private void fixDown(int k) { $yUPua/-
int j; cE?p~fq<
while ((j = k << 1) <= size) { r[#*..Y
if (j < size %26amp;%26amp; queue[j] j++; ?KE:KV[Y
if (queue[k]>queue[j]) file://不用交换 @ 0/EKWF
break; GC(QV}9z"
SortUtil.swap(queue,j,k); #IJ6pg>K
k = j; X+/^s)
} \KKE&3=
} ~y/qm [P
private void fixUp(int k) { ^S(QvoaQ
while (k > 1) { A-h[vP!v|
int j = k >> 1; .}E@7^X
if (queue[j]>queue[k]) :W+%jn
break; )q[Wzx_ j<
SortUtil.swap(queue,j,k); (-@I'CFd
k = j; KHM,lj*
} SPauno <M
} db>"2EE
$^YHyfh
} cqcH1aSv
'>Thn{
} n8FIxl&u
:w7?]y6~S
SortUtil： F|P?|
r&~]6 U
package org.rut.util.algorithm; Q@*9|6-
?!3u?Kd
import org.rut.util.algorithm.support.BubbleSort; O8-Z >;
import org.rut.util.algorithm.support.HeapSort; 29&F_
import org.rut.util.algorithm.support.ImprovedMergeSort; Bp4#"y2
import org.rut.util.algorithm.support.ImprovedQuickSort; l-SVI9|<0
import org.rut.util.algorithm.support.InsertSort; 9Fg:
import org.rut.util.algorithm.support.MergeSort; hW\'EJ
import org.rut.util.algorithm.support.QuickSort; iEbW[sX[4
import org.rut.util.algorithm.support.SelectionSort; 7Q~$&G
import org.rut.util.algorithm.support.ShellSort; *9`k$'
gm1RQ^n,@.
/** aFL<(,~r
* @author treeroot MFipXE!
* @since 2006-2-2 H)Z$j&S{
* @version 1.0 f{|n/j;n=C
*/ 'vKae
public class SortUtil { J8[aVG
public final static int INSERT = 1; w,X J8+B
public final static int BUBBLE = 2; Vw`%|x"Xz
public final static int SELECTION = 3; th5UzpB4
public final static int SHELL = 4; *r|13|k
public final static int QUICK = 5; #fXy4iL l
public final static int IMPROVED_QUICK = 6; >xXq:4l>}
public final static int MERGE = 7; 9j5B(_J^
public final static int IMPROVED_MERGE = 8; XMaw:Fgr
public final static int HEAP = 9; z$VVt?K
GY"c1KE$
public static void sort(int[] data) { kc2 8Q2
sort(data, IMPROVED_QUICK); jV<5GWq
} +^.xLTX`$
private static String[] name={ Wxi;Tq9C@_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q v},X~^R
}; {#&D=7LP
JtF)jRB0,
private static Sort[] impl=new Sort[]{ 0QEcJ]Qb8
new InsertSort(), TjpAJW@-
new BubbleSort(), |:`)sx3@#
new SelectionSort(), ${97G#
new ShellSort(), C%/@U[;
new QuickSort(), V3/OKI\o
new ImprovedQuickSort(), X@7:FzU9
new MergeSort(), .73sY5hdTN
new ImprovedMergeSort(), X3y28 %R
new HeapSort() !"ydl2
}; @}'?o_/C
@k/|%%uP
public static String toString(int algorithm){ ]puDqu5!
return name[algorithm-1]; .fK~IKA
} "po;[ Ia2
\#gguq?[
public static void sort(int[] data, int algorithm) { \t? ;p-+ta
impl[algorithm-1].sort(data); !HXyvyDN
} -1ci.4F&
IcNZUZGE
public static interface Sort { {RD9j1
public void sort(int[] data); f3<2531/}
} dx.Jv/Mb
%mOQIXr1s
public static void swap(int[] data, int i, int j) { aED73:b
int temp = data; ho!qXS
data = data[j]; TnuA uui*
data[j] = temp; EV;"]lC9
} {9~3y2:
} Ctk1\quz