[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; oL<^m?-u
} &R 0BuFL8
int i1=l; }b1P!xb!A
int i2=mid+1; $Q?UyEi
for(int cur=l;cur<=r;cur++){ Ngg (<ZN
if(i1==mid+1) Cu0/TeEM
data[cur]=temp[i2++]; *{XbC\j
else if(i2>r) }@x0@sI9
data[cur]=temp[i1++]; o<x2,uT
else if(temp[i1] data[cur]=temp[i1++]; RNm/&F1C$
else _Wgg=A"G
data[cur]=temp[i2++]; jML}{>Gy8S
} ?A]:`l_"
} 6CCM7
HSTtDTo
} hGPjH=^EM
Jr#ptf"Wu
改进后的归并排序: zg)]:
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package org.rut.util.algorithm.support; : G<1
OYe @P
import org.rut.util.algorithm.SortUtil; .rwZ`MP
!W8$-iq
/** dD#A.C,Rz
* @author treeroot 3Y>!e#
* @since 2006-2-2 lx%<oC+M
* @version 1.0 d kPfdK}G
*/ qF>}"m
public class ImprovedMergeSort implements SortUtil.Sort { ).xQ~A\.
;X\,-pjv
private static final int THRESHOLD = 10; SC'fT!
%h3CQk
/* ujHqwRh
* (non-Javadoc) ZU/6#pb
* e5MX5 T^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,*Sj7qb#
*/ y+@7k3"
public void sort(int[] data) { =T!M`
int[] temp=new int[data.length]; Uh*V>HA#
mergeSort(data,temp,0,data.length-1); E{h
} &g|-3)A
o ;.j_
private void mergeSort(int[] data, int[] temp, int l, int r) { $ -;,O8yR
int i, j, k; _8kZ>w(L
int mid = (l + r) / 2; z0a=A:+/
if (l == r) F $B_;G
return; cu.f]'
if ((mid - l) >= THRESHOLD) Ow<=K:^
mergeSort(data, temp, l, mid); xoPpu
else EZao\,t
insertSort(data, l, mid - l + 1); (J5E]NV
if ((r - mid) > THRESHOLD) =ejkE; %L
mergeSort(data, temp, mid + 1, r); @"];\E$sI
else vTN$SgzfCU
insertSort(data, mid + 1, r - mid); }~yhkt5K
NEJxd%-
for (i = l; i <= mid; i++) { 5^*I]5t8
temp = data; d XrLeoK
} Wfz&:J#
for (j = 1; j <= r - mid; j++) { pGzzv{H
temp[r - j + 1] = data[j + mid]; d_]zX;_
} le`fRq8f&
int a = temp[l]; t*~V]wZ
int b = temp[r]; Fep#Pw1
for (i = l, j = r, k = l; k <= r; k++) { +,f|Y6L<
if (a < b) { ]^p6dbzWe
data[k] = temp[i++]; U)o(}:5xF
a = temp; w>J|416
} else { .9PPWY;H
data[k] = temp[j--]; ilHZx2k
b = temp[j]; ?V3e;n
} C0Z mv
} -xPv]j$
} a"4j9cO
?vp' /l"
/** B;@7
* @param data {}y"JbXMj
* @param l |9Q4VY'";
* @param i 1 \:5ow&a
*/ pqmtN*zV
private void insertSort(int[] data, int start, int len) { &A)AV<=>T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wsYvbI!
} O4dJ> O
} W_8N?coM
} DD{-xCCR
} JvX]^t/}
s]@()?.E$
堆排序： Zn0e#n
dZK/v
package org.rut.util.algorithm.support; >Z r f}H
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import org.rut.util.algorithm.SortUtil; #q#C_"
Y@B0.5U2
/** C@1B?OfJ
* @author treeroot 5+Fr/C
* @since 2006-2-2 0}H7Xdkp
* @version 1.0 9K,PT.c
*/ (dmLEt
public class HeapSort implements SortUtil.Sort{ '-c *S]:r
wX<w)@
/* (non-Javadoc) i;B &~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?"04u*u3
*/ AH-B/c5
public void sort(int[] data) { GWd71ZtFO
MaxHeap h=new MaxHeap(); f3PDLQA
h.init(data); fSc)PqLP
for(int i=0;i h.remove(); S7a05NO
System.arraycopy(h.queue,1,data,0,data.length); x9\z^GU%H
} pY.R?\
TP3KT)
private static class MaxHeap{ 7]sRHX0o%
WAq!_xE
void init(int[] data){ b:B+x6M
this.queue=new int[data.length+1]; R|D%1@i]
for(int i=0;i queue[++size]=data; %Yw?!GvL[
fixUp(size); +%Z#!1u
} nIZ;N!r=i
} Z-%zR'-?*
1FA:"0lO
private int size=0; 6&* z
Yw(O}U 5e
private int[] queue; ^O6eFD U
+-X 68`
public int get() { ?i{/iH~Sf
return queue[1]; NJ^Bv`
} MoZ8A6e?B
@bRKJPU9)
public void remove() { 1u8 k}
SortUtil.swap(queue,1,size--); d HN"pNNs
fixDown(1); XgI;2Be+&a
} i2P:I A|@
file://fixdown 3-/F]}0y6
private void fixDown(int k) { Y;)l
int j; @#r6->%W
while ((j = k << 1) <= size) { +lplQh@RB
if (j < size %26amp;%26amp; queue[j] j++; 8AVtUU
if (queue[k]>queue[j]) file://不用交换 G)IK5zCDd
break; u']}Z%A9`
SortUtil.swap(queue,j,k); "|Gr3sD
k = j; Y'y yrn}
} `O0bba=:=
} D wfw|h
private void fixUp(int k) { 5[y+X|Am
while (k > 1) { gb{8SG5ac
int j = k >> 1; }Y"vUl_I2
if (queue[j]>queue[k]) !aB~G}'
break; 4_P6P
SortUtil.swap(queue,j,k); f"z;'
k = j; kGmz1S}2
} vRh)o1u)
} -}1TT@
:85QwN]\
} `mthzc3W
|LRAb#F\
} k4PXH
m[CyvcF*u
SortUtil： UHgW-N"
bcgXpP
package org.rut.util.algorithm; G0A\"2U
iA<'i8$P
import org.rut.util.algorithm.support.BubbleSort; M._;3_)%/
import org.rut.util.algorithm.support.HeapSort; uPy5<c
import org.rut.util.algorithm.support.ImprovedMergeSort; lc3N i<3v
import org.rut.util.algorithm.support.ImprovedQuickSort; QHxof7
import org.rut.util.algorithm.support.InsertSort; \.'[!GE*c
import org.rut.util.algorithm.support.MergeSort; {FX]1:
import org.rut.util.algorithm.support.QuickSort; ^T*!~K8A
import org.rut.util.algorithm.support.SelectionSort; LzxO=+=9!q
import org.rut.util.algorithm.support.ShellSort; c^rWS&)P
UxxX8N
/** &>!-67
* @author treeroot 9 p,O>I
* @since 2006-2-2 jK".iqx2L
* @version 1.0 /ykc`E?f
*/ hQ}_(F_H
public class SortUtil { rog1
public final static int INSERT = 1; bU[_YuJbM
public final static int BUBBLE = 2; JVGTmS[3
public final static int SELECTION = 3; dz^b(q
public final static int SHELL = 4; 4K\o2p?4
public final static int QUICK = 5; +$Y*1{hyOo
public final static int IMPROVED_QUICK = 6; {\vVzy,t7
public final static int MERGE = 7; f5p/cUzX
public final static int IMPROVED_MERGE = 8; CiGXyhh
public final static int HEAP = 9; UCXRF
q(X7e
public static void sort(int[] data) { # E_S..
sort(data, IMPROVED_QUICK); *dxm|F98
} p_ f<@WE
private static String[] name={ lT*@f39~g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7#W]Qj
}; ;aj;(Z.p)
a#{"3Z2|
private static Sort[] impl=new Sort[]{ 0w: 3/WO
new InsertSort(), S>>wf:\ c
new BubbleSort(), LR{bNV[i
new SelectionSort(), Mk0x#-F
new ShellSort(), mj&OZ+
new QuickSort(), / Y od
new ImprovedQuickSort(), 6VC|] |*
new MergeSort(), E#_2t)20
new ImprovedMergeSort(), S0Io$\ha
new HeapSort() wJ pb$;
}; @HiGc^X(
U<Tv<7`
public static String toString(int algorithm){ M.6uWwzQR
return name[algorithm-1]; ?AD-n6
} 0j;ZPqEf3
w/O'&],x
public static void sort(int[] data, int algorithm) { 6T|Z4f|
impl[algorithm-1].sort(data); *oeXmY
} j}tM0Ug.U
4# PxJG6m
public static interface Sort { jdLu\=@z
public void sort(int[] data); }^0'IAXi
} C0KFN
UWEegFq*
public static void swap(int[] data, int i, int j) { U65l o[
int temp = data; tW4X+d"
data = data[j]; ju'aUzn
data[j] = temp; j6EF0/_|e
} -seLa(8F
} u:lBFVqk