[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; FI"HJwAs
} L0Y0&;y|R
int i1=l; =gjDCx$|
int i2=mid+1; 53Yxz3v
for(int cur=l;cur<=r;cur++){ I[0!SIqY
if(i1==mid+1) M:|8]y@
data[cur]=temp[i2++]; /=)L_
else if(i2>r) e[1>(l}Ss
data[cur]=temp[i1++]; 6e&$l-
else if(temp[i1] data[cur]=temp[i1++]; "AC^ rz~U
else Qz,|mo+
data[cur]=temp[i2++]; w^q7n
} (ChD]PWQ
} E.`6oX\L|
!_~UvxM+
} 5\hd4
=']3(6*
改进后的归并排序: #.._c?%4/
C\}/"
package org.rut.util.algorithm.support; lpgd#vr
y('k`>C
import org.rut.util.algorithm.SortUtil; RWKH%C[Yd
FhkkWWL
/** 3mO;JXd
* @author treeroot c_.-b=zm
* @since 2006-2-2 9QwKakci
* @version 1.0 mwC=o5O
*/ bsS:"/?>
public class ImprovedMergeSort implements SortUtil.Sort { ]<XR]FHx)
v^N`IJq
private static final int THRESHOLD = 10; ~"K,7sw!Y
O o8qyW
/* +=BAslk
* (non-Javadoc) S6xgiem
* 7 oQ[FdRn*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mi,&0xDea
*/ 9\JQ7$B
public void sort(int[] data) { SA;#aj}rV
int[] temp=new int[data.length]; R>/NE!q
mergeSort(data,temp,0,data.length-1); xY<{qHcX
} Vh|\_~9
i7*EbaYzUO
private void mergeSort(int[] data, int[] temp, int l, int r) { u92^(|
int i, j, k; y<:<$22O
int mid = (l + r) / 2; z>m=h)9d~
if (l == r) P7.'kX9
return; i-" p)2d=#
if ((mid - l) >= THRESHOLD) *\G)z|^yx
mergeSort(data, temp, l, mid); 0bS|fMgc
else mGjN_
insertSort(data, l, mid - l + 1); ?r=jF)C<'
if ((r - mid) > THRESHOLD) r(h`XMsU
mergeSort(data, temp, mid + 1, r); 7zemr>sIh
else W-efv
insertSort(data, mid + 1, r - mid); n.}E5%qK
_S}A=hK'
for (i = l; i <= mid; i++) { V~@^`Gd
temp = data; ,%9df+5k
} uXjP`/R|
for (j = 1; j <= r - mid; j++) { em{(4!W>
temp[r - j + 1] = data[j + mid]; Wb}c=hZv
} yQNV@T<o
int a = temp[l]; P"/G
int b = temp[r]; IZ/m4~
for (i = l, j = r, k = l; k <= r; k++) { 8s{?v&p
if (a < b) { Az;t"
data[k] = temp[i++]; @p6<Lw_E
a = temp; kM8{Cw
} else { v\tEVhm
data[k] = temp[j--]; 'cix`l|^
b = temp[j]; kF"@Ngv.
} n+;6=1d7ZW
} 'Ft0Ry<OL
} vw,rF`LjZ
)3Z ^h<"j
/** Ej".axjT
* @param data W2FD+ wt
* @param l _tTNG2
* @param i gKYfQ+
*/ $5D,sEC@
private void insertSort(int[] data, int start, int len) { -i yyn^|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pi<TFe@eG
} anMF-x4/*q
} R_XR4)(<
} ?W^c4NtP
} UcOk3{(z$q
R\@/U=iqR
堆排序： {!t7[Ctb
eq(am%3~
package org.rut.util.algorithm.support; fk1ASV<rN
ojvj}ln
import org.rut.util.algorithm.SortUtil; J &pO%Q=b
FCi U
/** [I!6PGx
* @author treeroot 2EZb )&Q
* @since 2006-2-2 Y2o?gug
* @version 1.0 $6OkIP.
*/ WmY``
public class HeapSort implements SortUtil.Sort{ ~cTN~<{dq
+_XzmjnDd
/* (non-Javadoc) 7(5xL T$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5[0 O'%$
*/ y{dTp
public void sort(int[] data) { .ZvM^GJb
MaxHeap h=new MaxHeap(); ![]``g2
h.init(data); \7Jg7*
for(int i=0;i h.remove(); V-<GT?
System.arraycopy(h.queue,1,data,0,data.length); 1%4sHSN
} I!e})Y
S;$-''o?9
private static class MaxHeap{ wiz$fj
]o cWt3|
void init(int[] data){ fFb_J`'ue
this.queue=new int[data.length+1]; T!Hb{Cg*
for(int i=0;i queue[++size]=data; Og,$ sH}`
fixUp(size); 3|.um_
} \jOA+FU[
} bFe+m1Q_
_?OW0x4
private int size=0; oD<kMK
JSW^dw&
private int[] queue; |B?27PD
Re P|UH
public int get() { X!e[GJ
return queue[1]; $5Xh,DOg
} #Q2Y&2`yGT
Y.g59X!Ub2
public void remove() { J]nohICe
SortUtil.swap(queue,1,size--); uc;8 K,[t
fixDown(1); n4}Br;%
} :xtXQza"-
file://fixdown g!rQ4#4
private void fixDown(int k) { .Fdgb4>BXX
int j; N[s}qmPha
while ((j = k << 1) <= size) { -$\+' \
if (j < size %26amp;%26amp; queue[j] j++; $0vb^
if (queue[k]>queue[j]) file://不用交换 6 J{k(H$3
break; zT!drq:x
SortUtil.swap(queue,j,k); W[Ls|<Q
k = j; ;kY(<{2
} &*+'>UEe5
} "rx-_uK*
private void fixUp(int k) { O^oWG&Y;v
while (k > 1) { vQ;Ex
int j = k >> 1; 9I6a"PGDb
if (queue[j]>queue[k]) ~`aa5;Ab_
break; .Y&)4+ckL
SortUtil.swap(queue,j,k); :Zlwp6
k = j; ;M)QwF1
} z6*X%6,8
} r"P|dlV-
eAE`#t
} 7S}_F^
0*f)=Q'
} DGS$Ukz&T
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SortUtil： L7dd(^
o,_?^'@
package org.rut.util.algorithm; < jJ
OX\A|$GS
import org.rut.util.algorithm.support.BubbleSort; 3yVMXK
import org.rut.util.algorithm.support.HeapSort; 59h)-^!
import org.rut.util.algorithm.support.ImprovedMergeSort; kM,C3x{A
import org.rut.util.algorithm.support.ImprovedQuickSort; 9[<)WQe6M
import org.rut.util.algorithm.support.InsertSort; RW<D<5C
import org.rut.util.algorithm.support.MergeSort; <g"{Wv: h
import org.rut.util.algorithm.support.QuickSort; =ALTUV3/q
import org.rut.util.algorithm.support.SelectionSort; bbE!qk;hEP
import org.rut.util.algorithm.support.ShellSort; ?l9XAWt\
D]zwl@sRX:
/** 8X[:j&@
* @author treeroot U/!TKic+
* @since 2006-2-2 |?,A]|j
* @version 1.0 1q7|OWFT
*/ f4fvrL
public class SortUtil { N sXHO
public final static int INSERT = 1; 8WXQOo8
public final static int BUBBLE = 2; MN\HDKN
public final static int SELECTION = 3; 4K\G16'$v
public final static int SHELL = 4; 8Vr%n2M
public final static int QUICK = 5; o~`/_+
public final static int IMPROVED_QUICK = 6; nLXlU*ES
public final static int MERGE = 7; fdFo#P
public final static int IMPROVED_MERGE = 8; `sn^ysp
public final static int HEAP = 9; "&Y`+0S8
k>;`FFQU>
public static void sort(int[] data) { HiZ*+T.B
sort(data, IMPROVED_QUICK); Q'=x|K#xj
} *\ R ]NV
private static String[] name={ X% t1T4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IG2r#N|C#
}; F3On?x)
Te"ioU?.
private static Sort[] impl=new Sort[]{ k\5c|Wq|g
new InsertSort(), ~%&LTX0s|
new BubbleSort(), 9jM}~XvV
new SelectionSort(), H\ F:95
new ShellSort(), Lt64JH^lz
new QuickSort(), <:+x+4ru
new ImprovedQuickSort(), 5?{r
new MergeSort(), +^60T$
new ImprovedMergeSort(), TM%|'^)
new HeapSort() ]cHgleHQ
}; +r2+X:#~T
]d$8f
public static String toString(int algorithm){ "@V Y
return name[algorithm-1]; j()7_
} V?6a8lJ
ZMQZs~;~d
public static void sort(int[] data, int algorithm) { .*OdqLz
impl[algorithm-1].sort(data); wr$("A(
} oH97=>
y%"{I7!A
public static interface Sort { DX#Nf""Pw
public void sort(int[] data); <cps2*'
} dqU~`b9
we;-~A5J
public static void swap(int[] data, int i, int j) { n]._uza
int temp = data; ?WGA?J %2
data = data[j]; %~4M+r6T
data[j] = temp; <FV1Wz
} j'Fpjt"&=
} <sb~ ^B