[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; z.itVQs$I
} qE73M5L&
int i1=l; sr(f9Vl
int i2=mid+1; 0^htwec!
for(int cur=l;cur<=r;cur++){ /(-X[[V
if(i1==mid+1) qI,4uGg
data[cur]=temp[i2++]; }{<@wE%s
else if(i2>r) V<f76U)
data[cur]=temp[i1++]; KCG-&p$v@s
else if(temp[i1] data[cur]=temp[i1++]; nJH+P!AC
else k[3J5 4`g1
data[cur]=temp[i2++]; f(Jz*el S
} V4Yw"J
} h\GlyH~
h?H:r <
} G @ib
J}IHQZS
改进后的归并排序: lqPzDdC^>
gKK*` L~
package org.rut.util.algorithm.support; JA'C\
NbyVBl0=
import org.rut.util.algorithm.SortUtil; cY1d6P0
*3_@#Uu7
/** +/,J$(
* @author treeroot nY7 ZK
* @since 2006-2-2 !o A,^4(
* @version 1.0 7I>@PVN
*/ @ %LrpD
public class ImprovedMergeSort implements SortUtil.Sort { 0_7A <
h"<-^=b
private static final int THRESHOLD = 10; u*/.
B16,c9[
/* cnfjOg'\{
* (non-Javadoc) J)R;NYl
* E>xd*23+\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w>M8FG(4]
*/ #P8R
public void sort(int[] data) { m4FT^^3yE
int[] temp=new int[data.length]; pUV3n 1{2
mergeSort(data,temp,0,data.length-1); ~Xa8\>
} "W:#4@ F
cTW3\S=
private void mergeSort(int[] data, int[] temp, int l, int r) { MpZ #
int i, j, k; 5v:c@n
int mid = (l + r) / 2; Lw EI
if (l == r) +D ,Nd=/
return; Y0`=h"g
if ((mid - l) >= THRESHOLD) \%fl`+`
mergeSort(data, temp, l, mid); EMyMed_
else $`L!2
insertSort(data, l, mid - l + 1); ^(5Up=.EA
if ((r - mid) > THRESHOLD) dq$H^BB+>
mergeSort(data, temp, mid + 1, r); nZ>8r
else dD _(MbTt
insertSort(data, mid + 1, r - mid); </,RS5ukn
cfn\De%.
for (i = l; i <= mid; i++) { NbPv>/r
temp = data; 34lt?6%j
} Qo7]fnnaV
for (j = 1; j <= r - mid; j++) { /ekeU+j
temp[r - j + 1] = data[j + mid]; 1+\ZLy!5:
} 04eE\%?
int a = temp[l]; i@7b
int b = temp[r]; %W!C
for (i = l, j = r, k = l; k <= r; k++) { &m@~R|
if (a < b) { 1&_93
data[k] = temp[i++]; |L XYF$
a = temp; \-A=??@H
} else { vb 2mY
data[k] = temp[j--]; }%z {tn
b = temp[j]; px!lJtvgo
} yHS=8!
} tBSHMz
} *uJcB|KX
_=ani9E]uF
/** >^vyp!
* @param data 7v9l+OX,6
* @param l QH:PClW![
* @param i u(W%snl
*/ Q2wEt >0a
private void insertSort(int[] data, int start, int len) { Y/\y"a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gt9(@USK
} m:EO}ws=
} *_Y{wNF*
} [~cb&6|M
} 3N8RZt1.b
&_mOw.
堆排序： j*uc$hC"
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package org.rut.util.algorithm.support; !1+yb.{\
KjK.Sv{N
import org.rut.util.algorithm.SortUtil; ~";GH20
m0XdIC]s
/** cuenDw=eC
* @author treeroot k+8K[?K-
* @since 2006-2-2 j<+QGd%
* @version 1.0 &DnX6%2
*/ RLuA^ONI
public class HeapSort implements SortUtil.Sort{ X%iiz
j6zZ! k
/* (non-Javadoc) yht|0mZV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ')ZM# :G
*/ D[d+lq#p
public void sort(int[] data) { ";:"p6?
MaxHeap h=new MaxHeap(); u=epnz:<
h.init(data); n}NO"eF>-s
for(int i=0;i h.remove(); FjUf|
System.arraycopy(h.queue,1,data,0,data.length); 4.?tP7UE
} N7/eF9
1A>>#M=A
private static class MaxHeap{ Y", :u@R
E+>$@STv#
void init(int[] data){ |3tq.JU
this.queue=new int[data.length+1]; UPs7{We W
for(int i=0;i queue[++size]=data; RweK<Flo'S
fixUp(size); &p/^A[
} =uM2l
} xl.iI$P
Bismd21F6=
private int size=0; e;QPn(
{<\[gm\X
private int[] queue; -)S(eqq1
g=8}G$su{%
public int get() { )?@X{AN&
return queue[1]; /5@4}m>Z@
} :Taequk
6 w"-&
public void remove() { +4<Ij/}p
SortUtil.swap(queue,1,size--); &~ =q1?
fixDown(1); 8T3j/D<r
} 3vs;ZBM
file://fixdown zq(R!a6
private void fixDown(int k) { Q&p'\6~
int j; Aw]W-fx
while ((j = k << 1) <= size) { r!DUsE
if (j < size %26amp;%26amp; queue[j] j++; VK7lm|J+
if (queue[k]>queue[j]) file://不用交换 gEFs4; CN
break; }E?{M~"<
SortUtil.swap(queue,j,k); K,pQ11J
k = j; Q?e]N I^
} lIs<&-0
} v.wHj@
private void fixUp(int k) { ^cQTRO|
while (k > 1) { )vO?d~x|
int j = k >> 1; |2oCEb1
if (queue[j]>queue[k]) 3zV{cm0
break; B?;!j)FUtt
SortUtil.swap(queue,j,k); N~<H`
k = j; q-3,p.
} Yv}V =O%
} pf_(?\oz>
EX]LH({?+L
} f$\gm+&hXE
qXI>x6?*
} JqX+vRY;dd
F\Qukn
SortUtil： h]|E,!H
KJ/ *BBf
package org.rut.util.algorithm; HY (|31
D_n(T')
import org.rut.util.algorithm.support.BubbleSort; )0RznFJ+X
import org.rut.util.algorithm.support.HeapSort; BQ\o?={
import org.rut.util.algorithm.support.ImprovedMergeSort; P, (#' W
import org.rut.util.algorithm.support.ImprovedQuickSort; P5vxQR_*lc
import org.rut.util.algorithm.support.InsertSort; @j|B1:O
import org.rut.util.algorithm.support.MergeSort; az5 $.
import org.rut.util.algorithm.support.QuickSort; *3,Kn}ik
import org.rut.util.algorithm.support.SelectionSort; fT:a{
import org.rut.util.algorithm.support.ShellSort; #M9rt~4
wOhiC$E46
/** s<}d)L(
* @author treeroot ;ALkeUR[
* @since 2006-2-2 9DAk|K
* @version 1.0 F;I %9-R
*/ Y|NL #F
public class SortUtil { 8efQ-^b.
public final static int INSERT = 1; _A[k&nO!&J
public final static int BUBBLE = 2; Klw\
public final static int SELECTION = 3; jB"?iC.
public final static int SHELL = 4; 9ZKB,
public final static int QUICK = 5; yXuc<m
public final static int IMPROVED_QUICK = 6; B~[}E]WEK
public final static int MERGE = 7; H<gC{:S
public final static int IMPROVED_MERGE = 8; Bu:h_sV D
public final static int HEAP = 9; W7k0!Grrl
s>A!Egmo
public static void sort(int[] data) { m2j&v$
sort(data, IMPROVED_QUICK); SHc<`M'+
} #osP"~{
private static String[] name={ %Ls5:Z=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L?WF[nFR
}; G;^},%<
{$dq7m(
private static Sort[] impl=new Sort[]{ tEj-c@`"x-
new InsertSort(), Oa8lrP`(
new BubbleSort(), O.ce"5Y^
new SelectionSort(), C`p)S`d
new ShellSort(), BtPUUy.
new QuickSort(), 7q%<JZPY
new ImprovedQuickSort(), !uoQLiH+
new MergeSort(), zvzS$Gpe
new ImprovedMergeSort(), $]{20"
new HeapSort() N-lo[bDJh
}; dKKh^D`~
Z9TUaMhF
public static String toString(int algorithm){ Y?1 3_~ K
return name[algorithm-1]; 'dkKBLsx
} ZSB_OS[N
X=sC8Edx
public static void sort(int[] data, int algorithm) { zc}qAy'<
impl[algorithm-1].sort(data); -uE2h[X|
} ??4#)n k
LjE@[@d
public static interface Sort { U\crp T`
public void sort(int[] data); aJQx"6c?
} Z#J cNquM
~+JEl%
public static void swap(int[] data, int i, int j) { XAn{xNpz
int temp = data; ~v /NG
data = data[j]; R<5GG|(B
data[j] = temp; zOkIPv52~
} $r>\y (W
} lphELPh