[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; t00\yb^vJ8
} +.XZK3
int i1=l; cA2^5'$$
int i2=mid+1; m j'"Z75
for(int cur=l;cur<=r;cur++){ 6@*5!,
if(i1==mid+1) ?r^ hmu"a
data[cur]=temp[i2++]; |Gf1^8:C9
else if(i2>r) &?}kL= h
data[cur]=temp[i1++]; ^uKnP>*l
else if(temp[i1] data[cur]=temp[i1++]; bEoB;]
else {d&X/tT
data[cur]=temp[i2++]; bS_y_9K
} 4Z<]4:o
} p} t{8j>
}wa}hIqx
} V:nMo2'hb
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改进后的归并排序: #rSasucr
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package org.rut.util.algorithm.support; 7F>gj
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import org.rut.util.algorithm.SortUtil; !D.= 'V
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/** lQ=&jkw
* @author treeroot lGD%R'}
* @since 2006-2-2 HPu/. oE
* @version 1.0 z v L>(R
*/ =F",D=
public class ImprovedMergeSort implements SortUtil.Sort { l044c,AW(
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private static final int THRESHOLD = 10; l(3'Re
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/* 1NE!=;VOl
* (non-Javadoc) y^EF<<\
* "z{_hp{T^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N(:EK
*/ SdjUhR+o
public void sort(int[] data) { }a #b$]Y
int[] temp=new int[data.length]; lOWB^uS%
mergeSort(data,temp,0,data.length-1); Q2_WH)J 3
} Mhu53DT
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private void mergeSort(int[] data, int[] temp, int l, int r) { {UV<=R,E
int i, j, k; PMz{8 F
int mid = (l + r) / 2; XudH
if (l == r) $ g1wK}B3
return; mK7^:(<.LO
if ((mid - l) >= THRESHOLD) qb>|n1F_
mergeSort(data, temp, l, mid); 6ywnyh
else h=iA;B^>
insertSort(data, l, mid - l + 1); +7U A%q
if ((r - mid) > THRESHOLD) 0~@L%~
mergeSort(data, temp, mid + 1, r); [t"_}t=w
else z1{E:~f
insertSort(data, mid + 1, r - mid); xy-$v
{LMS~nx
for (i = l; i <= mid; i++) { =hOj8;2
temp = data; pR@GvweA
} HiS,q0
for (j = 1; j <= r - mid; j++) { _4XoUE\\
temp[r - j + 1] = data[j + mid]; :e0R7sj
} K&\BwBU
int a = temp[l]; `/gEKrhL-
int b = temp[r]; O>b&-U"R
for (i = l, j = r, k = l; k <= r; k++) { ?}1JL6mF{
if (a < b) { YP .%CD(K
data[k] = temp[i++]; ^t^<KL;
a = temp; mhJOR'2
} else { QvK]<HEr
data[k] = temp[j--]; QJ(e*/
b = temp[j]; w/^0tZ~
} N#-kk3!Z;
} a\[fC=]r:
} Rrs`h `'-
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/** :(S/$^U
* @param data ]Nd'%M
* @param l J4'!
* @param i !5' 8a5
*/ 1Hk<_no5
private void insertSort(int[] data, int start, int len) { kw-Kx4 )
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1TD&&EC
} 00.iMmJ
} u{E^<fW]
} e G*s1uQl
} G(Idiw#WT
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堆排序： #`6OC)1J
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package org.rut.util.algorithm.support; 1 [~|
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import org.rut.util.algorithm.SortUtil; 5@%=LPV
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/** 9(FcA5Y
* @author treeroot ezq q@t9
* @since 2006-2-2 i$LV44
* @version 1.0 0or6_y6
*/ Velbq
public class HeapSort implements SortUtil.Sort{ dPdHY&#`
RAx]Sp Q-S
/* (non-Javadoc) ~V$5m j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1r-,VX7
*/ I`n1M+=%
public void sort(int[] data) { E<m"en&v
MaxHeap h=new MaxHeap(); I+4qu|0lA
h.init(data); )V+Dqh,-g
for(int i=0;i h.remove(); abk:_
System.arraycopy(h.queue,1,data,0,data.length); Rp@}9qijb
} YWBP'Mo
/*R' xBr
private static class MaxHeap{ :#!F 7u
MgK(gL/&[
void init(int[] data){ zKAyfn.A
this.queue=new int[data.length+1]; $m%/veD k
for(int i=0;i queue[++size]=data; T?}=k{C]
fixUp(size); $,@ rKRY
} DkMC!Q\
} V:"\(Y
2Z1(J% 7
private int size=0; $;`2^L
()IgSj?,
private int[] queue; VTX'f2\
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public int get() { H&K)q5~
return queue[1]; 1MzB?[gx
} v_F?x!
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public void remove() { &)'kX
SortUtil.swap(queue,1,size--); w!Lb;4x ?
fixDown(1); ne~#{q
} h^,YYoA$
file://fixdown "@<g'T0
private void fixDown(int k) { PT*@#:MA
int j; U?m?8vhR6(
while ((j = k << 1) <= size) { 6nk|*HPz
if (j < size %26amp;%26amp; queue[j] j++; #(}_2x5
if (queue[k]>queue[j]) file://不用交换 kd2'-9
break; l[j0(T
SortUtil.swap(queue,j,k); _xwfz]lb+
k = j; ;og<eK
} RoXOGVo
} Uc;IPS
private void fixUp(int k) { -`<N,
while (k > 1) { z&G3&?Z
int j = k >> 1; [8g\pPQ
if (queue[j]>queue[k]) ZFw743G
break; ;."{0gq
SortUtil.swap(queue,j,k); *} 4;1OVT
k = j; =|zyi|
} T//+&Sk[
} B'~i Z65
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} ,UJPLj^
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} F,$$N>
@?NLME
SortUtil： 9jFDBy+
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package org.rut.util.algorithm; *wl_8Sis}
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import org.rut.util.algorithm.support.BubbleSort; RR {9
import org.rut.util.algorithm.support.HeapSort; QLLVOJi
import org.rut.util.algorithm.support.ImprovedMergeSort; xg!\C@$
import org.rut.util.algorithm.support.ImprovedQuickSort; 3gXUfv2ID
import org.rut.util.algorithm.support.InsertSort; C 5!6k1TcE
import org.rut.util.algorithm.support.MergeSort; T[K?A+l
import org.rut.util.algorithm.support.QuickSort; dKG<"
import org.rut.util.algorithm.support.SelectionSort; ol>=tk 8}
import org.rut.util.algorithm.support.ShellSort; 4p g(QeR
h.%Qn vL
/** nr6[rq
* @author treeroot ^8t*WphZC
* @since 2006-2-2 h v+i{Z9!]
* @version 1.0 TV2:5@33
*/ Xc<9[@
public class SortUtil { ;L{y3CWT
public final static int INSERT = 1; hRiGW_t
public final static int BUBBLE = 2; 0a;zT O/"v
public final static int SELECTION = 3; k.hSN8
public final static int SHELL = 4; rJ*WxOoS{
public final static int QUICK = 5; .j,&/y&
public final static int IMPROVED_QUICK = 6; unB "dE
public final static int MERGE = 7; SQRz8,sqkw
public final static int IMPROVED_MERGE = 8; Msdwv.jM
public final static int HEAP = 9; F.w#AV
Lg53 Ms%
public static void sort(int[] data) { g7ROA8xu
sort(data, IMPROVED_QUICK); hj[g2S%X
} hYx^D>}]
private static String[] name={ {=Y&q~:8v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;<Q_4 V
}; G]4+Qr?
U%olH >1K
private static Sort[] impl=new Sort[]{ uSbg*OA
new InsertSort(), g9Ll>d)tE3
new BubbleSort(), {RO=4ba{J
new SelectionSort(), jV8><5C
new ShellSort(), kE|#mI[>
new QuickSort(), od|.E$B
new ImprovedQuickSort(), 9dv~WtH>5
new MergeSort(), ~-zC8._w3r
new ImprovedMergeSort(), ZaV@}=Rd8
new HeapSort() G 3x1w/L
}; ]+S QS^4
<;K/Yv'{r
public static String toString(int algorithm){ ]YKWa"
return name[algorithm-1]; `_ L|Is=n
} #pK)
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public static void sort(int[] data, int algorithm) { :zoX Xo
impl[algorithm-1].sort(data); <WmCH+>?r
} /+7L`KPD
AEJm/8,T
public static interface Sort { Sy55w={
public void sort(int[] data); q fe#kF9
} YWdvL3Bgk,
oPV"JGa/B4
public static void swap(int[] data, int i, int j) { D.}b<kDD
int temp = data; N"{o3QmA
data = data[j]; e%\KI\u
data[j] = temp; i=UJ*c
} %Z|*!A+wN5
} WBdb[N6\