[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; QB"+B]rV
} ZxAk
int i1=l; hMyN$7Z
int i2=mid+1; sL)7MtNwy
for(int cur=l;cur<=r;cur++){ _0o65?F
if(i1==mid+1) d+p^fBz
data[cur]=temp[i2++]; /BwG\GhM
else if(i2>r) tQE<'94A
data[cur]=temp[i1++]; %?Q<
else if(temp[i1] data[cur]=temp[i1++]; >Z>sR0s7
else fyEXnmB;
data[cur]=temp[i2++]; 2oo\SmO]
} rN'8,CV
} |]eWO#vs
',!>9Dj
} qOflvf
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改进后的归并排序: :A+}fBIN
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package org.rut.util.algorithm.support; {Ga=;0
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import org.rut.util.algorithm.SortUtil; `SQobH
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/** LtGjHB\+
* @author treeroot <B!DwMk;.
* @since 2006-2-2 a5pXn v]A
* @version 1.0 Ec&_&
*/ qfqL"G
public class ImprovedMergeSort implements SortUtil.Sort { fo~>y
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private static final int THRESHOLD = 10; F{Oaxn
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/* 0,B"p
* (non-Javadoc) HGF&'@dn
* Sa@T#%oU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "JE->iD
*/ R&Ss ET.
public void sort(int[] data) { LTuT"}dT[
int[] temp=new int[data.length]; [x'D+!
mergeSort(data,temp,0,data.length-1); N~P1^x~
} #'n.az=1
e ^ZY
private void mergeSort(int[] data, int[] temp, int l, int r) { TW}].A_-
int i, j, k; $,0EV9+af
int mid = (l + r) / 2; `dhBLAt
if (l == r) :KqSMuKR
return; ! F<::fN
if ((mid - l) >= THRESHOLD) 4'td6F
mergeSort(data, temp, l, mid); \jb62Jp
else LI<Emez
insertSort(data, l, mid - l + 1); OIkjO}/7
if ((r - mid) > THRESHOLD) KwgFh#e
mergeSort(data, temp, mid + 1, r); +U4';[LG1C
else O:ACp<@
insertSort(data, mid + 1, r - mid); r;p@T8k
/PbMt
for (i = l; i <= mid; i++) { Dl,sl>{
temp = data; egH,7f(yP
} 4q.yp0E
for (j = 1; j <= r - mid; j++) { '}:(y$9.`
temp[r - j + 1] = data[j + mid]; ia,5=SKJ
} {`-AIlH(
int a = temp[l]; Xka+1c
int b = temp[r]; n5)ml)m
for (i = l, j = r, k = l; k <= r; k++) { E!uQ>'iq.
if (a < b) { JeF$ W!!{
data[k] = temp[i++]; JJ'f\f9
a = temp; }R%*J
} else { 3Pp+>{2_?
data[k] = temp[j--]; ouO9%)zv
b = temp[j]; #m;o)KkH$r
} XN{WxcZ
} u6%\ZK._ \
} ?9>wG7cps7
N1$PW~)Y
/** 1K(mdL{m5
* @param data PF#<CF$=
* @param l (?TK P 7
* @param i /F46Ac}I
*/ <H{K&,Z(ZM
private void insertSort(int[] data, int start, int len) { lnK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k7j[tB#
} CD5% iFy
} My Ky*wD
} 6uKP BL@,
} ; 6PRi/@
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堆排序： hwA&SS
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package org.rut.util.algorithm.support; u /DE
q*tGlM@R?
import org.rut.util.algorithm.SortUtil; bZ:xH48MY
F1BXu@~e(
/** Ni|MTE]~
* @author treeroot !%$,S=_F
* @since 2006-2-2 (nXnP{yb
* @version 1.0 n-{d7haOa
*/ x+ER 3wDD@
public class HeapSort implements SortUtil.Sort{ k_uI&,
*$`N5;7'`
/* (non-Javadoc) ZJm$7T)V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $M/1pZ
*/ 8nL9#b
public void sort(int[] data) { SlHDBr!.z
MaxHeap h=new MaxHeap(); (h=]Ox
h.init(data); /W .G-|:
for(int i=0;i h.remove(); =f [/Pv
System.arraycopy(h.queue,1,data,0,data.length); .lM]>y)
} Zu~w:uNmU
bfm+!9=9S
private static class MaxHeap{ Ryh 0r
sjb.Ezoq3
void init(int[] data){ o`!#io
this.queue=new int[data.length+1]; |"S#uJW
for(int i=0;i queue[++size]=data; >Vg [A
fixUp(size); fM|s,'Q1x
} }q'IY:r
} U OGjil{.
v*FbvrY
private int size=0; vLBuE
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private int[] queue; z>iXNwz"?
1P'A*`!K
public int get() { 'Bxj(LaV-
return queue[1]; 0 f$96sl
} G 9(*F
JtsXMZz
public void remove() { l'@!'
SortUtil.swap(queue,1,size--); iSR"$H{
fixDown(1); BFhEDkk
} nB5\ocJ
file://fixdown 5S_fvW;
private void fixDown(int k) { ]$ Nhy8-
int j; ULBEe@s
while ((j = k << 1) <= size) { jT< I`K*
if (j < size %26amp;%26amp; queue[j] j++; ?1c7wEk
if (queue[k]>queue[j]) file://不用交换 ;(J&%
break; '/t9#I@G\
SortUtil.swap(queue,j,k); hdcB*j?4
k = j; >HRNB&]LdP
} ')~V=F
} t'0&n3
private void fixUp(int k) { w4CcdpR
while (k > 1) { *OdmKVw6G
int j = k >> 1; J\w4N",
if (queue[j]>queue[k]) pZlt4
break; ]z8/S!?
SortUtil.swap(queue,j,k); Yw]$/oP`
k = j; 8y
} *o\AP([@
} 'DNxc
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} @$ Nti>
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} TC44*BHq
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SortUtil： r_T"b
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package org.rut.util.algorithm; ,x!r^YO=
oXqJypR 2
import org.rut.util.algorithm.support.BubbleSort; qg1\ABH
import org.rut.util.algorithm.support.HeapSort; ,c$tKj5ulQ
import org.rut.util.algorithm.support.ImprovedMergeSort; ujkWVE'
import org.rut.util.algorithm.support.ImprovedQuickSort; _b>{:H&\
import org.rut.util.algorithm.support.InsertSort; _-TW-{7bh
import org.rut.util.algorithm.support.MergeSort; Z2`M8xEiH
import org.rut.util.algorithm.support.QuickSort; *?~"Jw
import org.rut.util.algorithm.support.SelectionSort; n7G`b'
import org.rut.util.algorithm.support.ShellSort; s$qc&
q :~/2<o
/** je2"D7D
* @author treeroot K]Vp! G
* @since 2006-2-2 GnUD<P=I
* @version 1.0 [KHlApL
*/ s]6;*mI2
public class SortUtil { "crp/Bj?
public final static int INSERT = 1; OFmHj]I7=
public final static int BUBBLE = 2; LAnC8O
public final static int SELECTION = 3; !OQ5AF$
public final static int SHELL = 4; 4)k-gKS*
public final static int QUICK = 5; a#i|)[
public final static int IMPROVED_QUICK = 6; +9|0\Q
public final static int MERGE = 7; 00f'G2n
public final static int IMPROVED_MERGE = 8; .5!`wwVi
public final static int HEAP = 9; ~@PD\
VF";p^
public static void sort(int[] data) { \P9ms?((A
sort(data, IMPROVED_QUICK); >B~? }@^Gk
} (n:A`]
private static String[] name={ #Y3-P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r-xP6
}; )*XWe|H_
?PTXgIC
private static Sort[] impl=new Sort[]{ S ~h*U2
new InsertSort(), \}W3\To_
new BubbleSort(), vzbGLap#
new SelectionSort(), M|h B[
new ShellSort(), j$XaO%y)
new QuickSort(), v=hn# U
new ImprovedQuickSort(), .K(9=yh
new MergeSort(), vY|YqWt
new ImprovedMergeSort(), H lM7^3(&
new HeapSort() ~Js kA5h|&
}; mVYfyLZ,(
*c=vEQn-
public static String toString(int algorithm){ f(blqO.@l
return name[algorithm-1]; %xG<hNw/
} nh5=0{va|L
_izjvg
public static void sort(int[] data, int algorithm) { g]}!
impl[algorithm-1].sort(data); IQtQf_"e1
} {r;_nMfH|[
kRwUR34yc
public static interface Sort { hDSf>X_*_G
public void sort(int[] data); Cd=$XJ-b
} 7}~w9jK"F
[ 't.x=
public static void swap(int[] data, int i, int j) { yhbU;qEG9
int temp = data; 7%? bl
data = data[j]; FvPWS!H
data[j] = temp; +swTMR
} V>Z4gZp5sc
} U_izKvEh