[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; |b)N;t
} O;<YLS^|6
int i1=l; ,5Tw5<S
int i2=mid+1; $a+)v#?,
for(int cur=l;cur<=r;cur++){ x8*@<]!
if(i1==mid+1) & A@!g
data[cur]=temp[i2++]; m{sch`bP
else if(i2>r) =_H)5I_\
data[cur]=temp[i1++]; .#ATI<t
else if(temp[i1] data[cur]=temp[i1++]; .t9zF-jk
else n!y}p q6
data[cur]=temp[i2++]; 9i#K{CkC|
} -X#qW"92q
} fT_swhIO
Qmn'G4#@E
} g3,F+
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改进后的归并排序: Nh\y@\F>
t8FgQ)tk
package org.rut.util.algorithm.support; MFLw^10(T
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import org.rut.util.algorithm.SortUtil; sR*JU%
auQfWO[ u
/** vW4N[ .+
* @author treeroot \Rvsy;7
* @since 2006-2-2 Bn{0-5nj
* @version 1.0 ?GKm_b]JC
*/ L\UM12
public class ImprovedMergeSort implements SortUtil.Sort { <x2 F5$@
gb/M@6/j
private static final int THRESHOLD = 10; ]j?Kn$nv*S
JSm3ZP|GqJ
/* k~b8=$
* (non-Javadoc) QYTwGThWR
* f^X\N/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pGGx.&5#82
*/ hKW!kA=gZ
public void sort(int[] data) { {:9P4<%H
int[] temp=new int[data.length]; z?8Sie
mergeSort(data,temp,0,data.length-1); 6 _\j_$
} ihdtq
yw)Ztg)
private void mergeSort(int[] data, int[] temp, int l, int r) { )hai?v~g
int i, j, k; ;M Z@2CO
int mid = (l + r) / 2; [M6/?4\
if (l == r) T3 k#6N.
return; mF !=H%
if ((mid - l) >= THRESHOLD) C\dlQQ
mergeSort(data, temp, l, mid); F /:2+
else >#\&%0OZw
insertSort(data, l, mid - l + 1); TID0x/j"K5
if ((r - mid) > THRESHOLD) }ZWeb#\
mergeSort(data, temp, mid + 1, r); \4`2k
else $R<eXDW6:
insertSort(data, mid + 1, r - mid); DweWFipyPi
\i#0:3s.
for (i = l; i <= mid; i++) { +C !A@
temp = data; r3b~|O^}
} &c!=< <5M
for (j = 1; j <= r - mid; j++) { @*c) s_
temp[r - j + 1] = data[j + mid]; L"6@3
} 6Pa jBEF
int a = temp[l]; QP e}rQnm
int b = temp[r]; \;A\ vQ[
for (i = l, j = r, k = l; k <= r; k++) { D0&{iZ(
if (a < b) { N]sX r
data[k] = temp[i++]; Eqva] 4
a = temp; aJDu_
} else { RFu]vFff
data[k] = temp[j--]; c!%:f^7g
b = temp[j]; 'HV}Tr
} PF(P"f.?D
} c};Qr@vpo
} O({-lI
:Y[r^=>
/** Yg#)@L
* @param data s"?&`S
* @param l xf@D<}~1
* @param i :8aIj_qds
*/ K9*#H(
private void insertSort(int[] data, int start, int len) { .W&rcqy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <ZNa`
} m H'jr$ ?
} STmCj
} F#^.L|d4
} ;D[b25
jL)aU> kN
堆排序： 5\tYs=>b<
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package org.rut.util.algorithm.support; U<NpDjc"
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import org.rut.util.algorithm.SortUtil; \?fl%r2
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/** ?^&!/,
* @author treeroot ls6ywLP{
* @since 2006-2-2 s^9N7'
* @version 1.0 "FaG5X(
*/ JCZJ\f*EZ
public class HeapSort implements SortUtil.Sort{ f(?`PD[
+Z[%+x92
/* (non-Javadoc) 0p$?-81BJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9bXU!l[
*/ }~-)31e'`
public void sort(int[] data) { \'"q6y
MaxHeap h=new MaxHeap(); -zz9k=q
h.init(data); ][bz5aV
for(int i=0;i h.remove(); _ #l b\
System.arraycopy(h.queue,1,data,0,data.length); );;UNO21+
} Z-H Kdv!d
u6jJf@!ws
private static class MaxHeap{ (s{%XB:K
s:cS 9A8
void init(int[] data){ 0tB9X9:,
this.queue=new int[data.length+1]; Zk}e?Grc
for(int i=0;i queue[++size]=data; ?#D@e5Wf
fixUp(size); 2#1FI0,Pa*
} $X~=M_W
} =W !m`
lLtC9:
private int size=0; v-[|7Pg}Z
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private int[] queue; m$hSL4N
O,JthlAV4
public int get() { g)&-S3\
return queue[1]; uD:O[H-x
} r:Cad0xj;^
Q:VD2<2
public void remove() { ,bmTBZV
SortUtil.swap(queue,1,size--); a$t [}D2
fixDown(1); nhXa&Nro
} n3b@6V1_
file://fixdown <k^9l6@
private void fixDown(int k) { >o>'@)I?e6
int j; B{1+0k
while ((j = k << 1) <= size) { 6x/ X8zu
if (j < size %26amp;%26amp; queue[j] j++; 6nGDoW#
if (queue[k]>queue[j]) file://不用交换 rzaEVXbz1
break; ! 2Y, a
SortUtil.swap(queue,j,k); l/rhA6kEU
k = j; gYzKUX@
} 9fl !CG
} {Y'_QW1:2
private void fixUp(int k) { YN>#zr+~
while (k > 1) { ?QVD)JI*k
int j = k >> 1; e$>5GM
if (queue[j]>queue[k]) F/EHU?_EI
break; [S</QS!
SortUtil.swap(queue,j,k); <!OP b(g2
k = j; tg8VFH2q.z
} 29Q5s$YD@
} [sNn^x
S-f3rL[?
} 2,QkktJLo
qs-:JmA_w
} \HK#d1>ox
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SortUtil： U-n33ty`H
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package org.rut.util.algorithm; @fE^w^K7
cF vGpZ
import org.rut.util.algorithm.support.BubbleSort; (c[h,>`@:
import org.rut.util.algorithm.support.HeapSort; *.nqQhW
import org.rut.util.algorithm.support.ImprovedMergeSort; /CA)R26G
import org.rut.util.algorithm.support.ImprovedQuickSort; v@t*iDa?7
import org.rut.util.algorithm.support.InsertSort; 3UN Jj&-`
import org.rut.util.algorithm.support.MergeSort; !&'xkw`
import org.rut.util.algorithm.support.QuickSort; &aF_y_f\
import org.rut.util.algorithm.support.SelectionSort; %W&=]&L
import org.rut.util.algorithm.support.ShellSort; A&t'uY6
swLgdk{8n
/** :&or'Yi}
* @author treeroot |g'sRTKJ
* @since 2006-2-2 nM0nQ{6
* @version 1.0 nW drVT$
*/ 10}Zoq|)n
public class SortUtil { hCxL4LrF
public final static int INSERT = 1; g:o\r (
public final static int BUBBLE = 2; nev*TYY?A
public final static int SELECTION = 3; }lxvXVc{I
public final static int SHELL = 4; Bnxzy n
public final static int QUICK = 5; ReK@~#hLY
public final static int IMPROVED_QUICK = 6; )7i?8XiSZF
public final static int MERGE = 7; l5h9Eq
public final static int IMPROVED_MERGE = 8; 3mm`8!R
public final static int HEAP = 9; IYQYW.`ly
Dh9-~}sW'
public static void sort(int[] data) { l[fNftT-
sort(data, IMPROVED_QUICK); %MjPQ
} yh0|f94m
private static String[] name={ %*19S.=l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }zobIfIF
}; &J~S $
%~W}262
private static Sort[] impl=new Sort[]{ W#lvH=y
new InsertSort(), f^%E]ki
new BubbleSort(), -91l"sI
new SelectionSort(), y2qESAZ%k}
new ShellSort(), SY$%!! @R
new QuickSort(), cLYc""=
new ImprovedQuickSort(), VmUM_Q~
new MergeSort(), f<}!A$wd
new ImprovedMergeSort(), n]$vCP
new HeapSort() 5AjK7[<L
}; |@@mq!>-
./fEx 'E
public static String toString(int algorithm){ ~F(+uJbO
return name[algorithm-1]; RV$+g.4
} "FXS;Jf
tAC,'im:*
public static void sort(int[] data, int algorithm) { FI/YJ@21
impl[algorithm-1].sort(data); zhCI+u4/qz
} )-QNWN H
18n84RkI9
public static interface Sort { `Eu(r]:W
public void sort(int[] data); Gz6GU.IyQy
} {//F>5~[
8uGPyH
public static void swap(int[] data, int i, int j) { Ffxk] o&%c
int temp = data; 7O9s5
data = data[j]; g~y9j88?
data[j] = temp; kCC9U_dj,
} v|/3Mi9mz
} !:n),sFv45