[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; d=vuy
} |}4\Gm
int i1=l; f}bq
int i2=mid+1; r84^/+"T
for(int cur=l;cur<=r;cur++){ R/oi6EKv
if(i1==mid+1) j0e,>X8
data[cur]=temp[i2++]; kkjugm{D7
else if(i2>r) E2dM0r<]
data[cur]=temp[i1++]; Z^|N]Ej
else if(temp[i1] data[cur]=temp[i1++]; ~X3g_<b_8
else F}}!e.>c
data[cur]=temp[i2++]; $2a"Ec!7
} tDRR3=9pX
} ]6e(-v!U
|]9@JdmV
} T01Iu
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改进后的归并排序: x-[ItJ% l
hS,&Nj+
package org.rut.util.algorithm.support; xF[%R{Mn'
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import org.rut.util.algorithm.SortUtil; `6~0W5
uHKEt[PS$
/** *a Z1 4
* @author treeroot U823q-x
* @since 2006-2-2 M8~3 0L
* @version 1.0 FaeKDbLJr
*/ 9vV==A#
public class ImprovedMergeSort implements SortUtil.Sort { vaB ql(?'2
4 . 7X*1
private static final int THRESHOLD = 10; F@?-^ E@
S"&Gutu3o
/* N6._Jb
* (non-Javadoc) N0p6xg~
* a^%)6E.[,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p3A9<g
*/ LFax$CZc
public void sort(int[] data) { G%I .u
int[] temp=new int[data.length]; ]Kt@F0U<o
mergeSort(data,temp,0,data.length-1); osXEzr(
} Vkg0C*L_
_^& q,S
private void mergeSort(int[] data, int[] temp, int l, int r) { 2K9X(th1
int i, j, k; !'N@ZZ
int mid = (l + r) / 2; B@(d5i{h
if (l == r) #4Z e2T|
return; 1b~21n
if ((mid - l) >= THRESHOLD) #+ch
mergeSort(data, temp, l, mid); #NFB=oJI
else 94w)Yln
insertSort(data, l, mid - l + 1); h^ Cm\V
if ((r - mid) > THRESHOLD) {IgH0+z
mergeSort(data, temp, mid + 1, r); $eFMn$o
else ;M.Q=#;E
insertSort(data, mid + 1, r - mid); 0OM^,5%8
M=raKb?F
for (i = l; i <= mid; i++) { 4 eLZ
temp = data; 1b3 a(^^E
} DKjiooD
for (j = 1; j <= r - mid; j++) { 9E ^!i
temp[r - j + 1] = data[j + mid]; g[(@@TiG
} .aT@'a{F
int a = temp[l]; K;6#v%
int b = temp[r]; ':(AiD-}
for (i = l, j = r, k = l; k <= r; k++) { :GIBB=D9
if (a < b) { gkd4)\9
data[k] = temp[i++]; ." xP{
a = temp; m8L *LB
} else { KM;H '~PZi
data[k] = temp[j--]; ,1{qZ(l1
b = temp[j]; a]r+np]vTy
} (}39f
} 4J5zSTw
} o4" [{LyT
1L!;lP2
/** !MKecRG_
* @param data )J[m>tyY5
* @param l Z9DfwWI2nu
* @param i N)"8CvQL
*/ [_JdV(]$
private void insertSort(int[] data, int start, int len) { n0lOq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *<sc[..)
} 44u)F@)
} &{? M} 2I
} sbmtx/%U
} +bE{g@%@+
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堆排序： KyNu8s k
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package org.rut.util.algorithm.support; + Tp% *
)Dz]Pv]H'
import org.rut.util.algorithm.SortUtil; ym|7i9
L?/AKg
/** S=,czs3N
* @author treeroot l6bY!I>
* @since 2006-2-2 EsKgS\`RZ
* @version 1.0 tM]Gu?6
*/ kf'(u..G
public class HeapSort implements SortUtil.Sort{ v;\cM/&5
RFRXOyGz$
/* (non-Javadoc) ?xqS#^Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $l*?Ce:
*/ )8C`EPe
public void sort(int[] data) { m538p.(LIR
MaxHeap h=new MaxHeap(); TnN ythwZ
h.init(data); :f[ w
for(int i=0;i h.remove(); |~5cNm
System.arraycopy(h.queue,1,data,0,data.length); _O}m0c
} 2"G9?)d9
{ YQS fk
private static class MaxHeap{ oYN"L
_\4#I(
void init(int[] data){ `/[5/%
this.queue=new int[data.length+1]; d0)]^4HT|y
for(int i=0;i queue[++size]=data; ?+.mP]d_
fixUp(size); #A5X,-4G
} Sesdhuy.@
} @.7/lRr@bp
}W'j Dz7O
private int size=0; [p6:uNo
]B )nN':
private int[] queue; c?CD;Pk
>>T7;[h
public int get() { jVnTpa!A
return queue[1]; 8vuTF*{yZ
} o6A$)m5V
hM]Z T5;<
public void remove() { H/{@eaV
SortUtil.swap(queue,1,size--); y^ skE{
fixDown(1); Kn->R9Tl
} //c6vG
file://fixdown <\epj=OclV
private void fixDown(int k) { F2 B(PGa7
int j; h|]cZMGo
while ((j = k << 1) <= size) { OpaRQ=
if (j < size %26amp;%26amp; queue[j] j++; :j`f%Vg~x
if (queue[k]>queue[j]) file://不用交换 h"ZIh= j@
break; `R2Iw I&
SortUtil.swap(queue,j,k); >s5}pkAv|e
k = j; =J1V?x=l@
} pK-tj
} }ex4dhx2M
private void fixUp(int k) { x[lIib1s
while (k > 1) { _6fy'%J=U
int j = k >> 1; ?w(hPUd!2
if (queue[j]>queue[k]) D\5+2 G
break; 7R6B}B?/
SortUtil.swap(queue,j,k); n5C,Z!)z
k = j; #Gi`s?
} `T*Y1@FV
} *{VC<<`
cRs.@U\{R\
} </;e$fh`
.hH_1Mo8
} l1T`[2
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SortUtil： oIO@#
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package org.rut.util.algorithm; )yyH_Ax2
[lML^CYQ
import org.rut.util.algorithm.support.BubbleSort; ZY,$oFdsi
import org.rut.util.algorithm.support.HeapSort; 9~`#aQG T
import org.rut.util.algorithm.support.ImprovedMergeSort; xwo*kFg
import org.rut.util.algorithm.support.ImprovedQuickSort; wKi#5k2
import org.rut.util.algorithm.support.InsertSort; ^S`hKv&87
import org.rut.util.algorithm.support.MergeSort; ZY8.p
import org.rut.util.algorithm.support.QuickSort; )!0}<_2
import org.rut.util.algorithm.support.SelectionSort; I;rW!Hb
import org.rut.util.algorithm.support.ShellSort; B0yJ9U= Fj
C5^WJx[
/** q>(?Z#sB
* @author treeroot ((`\i=-o5
* @since 2006-2-2 )&T 5/+
* @version 1.0 FDgo6x
*/ t#(=$
public class SortUtil { m Z +dr[
public final static int INSERT = 1; EHq;eF
public final static int BUBBLE = 2; HXT"&c|
public final static int SELECTION = 3; -6J <{1V
public final static int SHELL = 4; MUbKlX
public final static int QUICK = 5; zlP{1z;nV
public final static int IMPROVED_QUICK = 6; <O=0^V
public final static int MERGE = 7; l| uiC%T
public final static int IMPROVED_MERGE = 8; Rw `ezC#
public final static int HEAP = 9; [{2v}
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public static void sort(int[] data) { k~AtnI
sort(data, IMPROVED_QUICK); i ZPNss
} F_0D)H)N@
private static String[] name={ h;vY=r-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Eb~vNdPo
}; Ag2~q
}&+,y<>
private static Sort[] impl=new Sort[]{ _*UI}JtlS
new InsertSort(), :q3w;B~
new BubbleSort(), B`)sc ~u
new SelectionSort(), !2Ompcr1
new ShellSort(), 1\,k^Je7
new QuickSort(), Gjeb)Y6N
new ImprovedQuickSort(), =c\(]xX
new MergeSort(), %Qz<Lk">.
new ImprovedMergeSort(), "7EK{6&jQ
new HeapSort() ~x(|'`
}; iLv -*%%
3r#['UmT
public static String toString(int algorithm){ W*s=No3C
return name[algorithm-1]; P !f{U;B
} %r.OV_04
ShL!7y*rT{
public static void sort(int[] data, int algorithm) { F(.`@OO
impl[algorithm-1].sort(data); oUsfO-dET^
} 7:F0?l*
EGI$=Y
public static interface Sort { _R(ZvsOZ
public void sort(int[] data); .lj5pmD
} :vIJ>6lIR
" 4#&tNQ
public static void swap(int[] data, int i, int j) { .n+ ;&5
int temp = data; w=?nD6Xhz
data = data[j]; kwaZn~
data[j] = temp; }Ifa5Lq)
} p>pN?53S
} '*XIp: