[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; b-x,`s
} ,Uh7Q-vd
int i1=l; 1Lf:TQB
int i2=mid+1; f9Hm2wV
for(int cur=l;cur<=r;cur++){ b6k'`vLA
if(i1==mid+1) *CH lg1
data[cur]=temp[i2++]; |<n+6
else if(i2>r) ~X/1%
data[cur]=temp[i1++]; !PzlrH)M=p
else if(temp[i1] data[cur]=temp[i1++]; 'b* yYX<
else wER>a (
data[cur]=temp[i2++]; @qfVt
} ,ij"&XA
} h>6'M
GCUzKf&
} 9W{=6D86e
q,JMmhWaT
改进后的归并排序: <Cvlz^K[
wv2
package org.rut.util.algorithm.support; 'y [eH
IQS:tL/
import org.rut.util.algorithm.SortUtil; v[_C^;
OgiElA.
/** 5_@8g+~
* @author treeroot +oZq~2?*S6
* @since 2006-2-2 ag-\(i;K]
* @version 1.0 <|M cE
*/ (>x4X@b
public class ImprovedMergeSort implements SortUtil.Sort { n# %mL<
oyBBW?m
private static final int THRESHOLD = 10; Y{TzN%|LV
x?:[:Hf
/* M ]dS>W%U
* (non-Javadoc) 1Z?en
* (KDUX t.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I_('Mr)
*/ uoYG@L2
public void sort(int[] data) { Ji_3*(
int[] temp=new int[data.length]; Bf$YwoZov
mergeSort(data,temp,0,data.length-1); l@a>"\><i*
} TKpka]nJ
/R&!92I0*
private void mergeSort(int[] data, int[] temp, int l, int r) { )\C:|
int i, j, k; Fu0 dYN
int mid = (l + r) / 2; X !g"D6'
if (l == r) _ cK"y2
return; 2r2qZ#I}
if ((mid - l) >= THRESHOLD) a$p?r3y
mergeSort(data, temp, l, mid); <=A1d\
else vT V'D&x2
insertSort(data, l, mid - l + 1); cv(9v =](
if ((r - mid) > THRESHOLD) 7t7"glP
mergeSort(data, temp, mid + 1, r); ~ztsR;iL
else 6eqxwj{S[
insertSort(data, mid + 1, r - mid); =7@N'xX
*Ppb;
for (i = l; i <= mid; i++) { sK8=PZ\
temp = data; 96UL](l(`
} QS:dr."k
for (j = 1; j <= r - mid; j++) { `0Y`]kSY+
temp[r - j + 1] = data[j + mid]; iB;EV8E
} ;LRY h?
int a = temp[l]; +G';no\h
int b = temp[r]; F!*u}8/_!
for (i = l, j = r, k = l; k <= r; k++) { ~Rd,jfx
if (a < b) { ~Ts^z(v~D2
data[k] = temp[i++]; 0|kkwZVPn
a = temp; P,-f]k[_
} else { q}[g/%
data[k] = temp[j--]; hh/C{ l
b = temp[j]; ;i*<HNQ
} p|!5G&O,
} ~.99H
} `yYoVu*
?.tnaE
/** {"T$jV:GB
* @param data -j1?lY
* @param l mB!81%f%|
* @param i is`a_{5e=
*/ Cd(Ov5%
private void insertSort(int[] data, int start, int len) { fs`<x*}K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H%/$Rqg
} M"P$hb'F
} *EDzj&
} 0">#h
} 7gJ`G@y
\(Hg_]>m
堆排序： Maq{H`
r_o2d8
package org.rut.util.algorithm.support; $+rdzsf)+/
pM4 j=F
import org.rut.util.algorithm.SortUtil; gsAcn
yCQpqh
/** 'QkL%z0
* @author treeroot v[~ U*#i
* @since 2006-2-2 iedoL0#
* @version 1.0 yhTe*I=Gk
*/ AA@J~qd u
public class HeapSort implements SortUtil.Sort{ #$#{QEh0}
578Dl(I#)
/* (non-Javadoc) "HwlN_PA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XF>!~D
*/ >]A#_p
public void sort(int[] data) { Y4lNxvY
MaxHeap h=new MaxHeap(); F7/%,vf
h.init(data); PBcb*7W
for(int i=0;i h.remove(); (dx~lMI
System.arraycopy(h.queue,1,data,0,data.length); e2>AL
} .81 ~ K[
U7e2NES
private static class MaxHeap{ cxFyN;7
yMmUOIxk\
void init(int[] data){ k'sPA_|
this.queue=new int[data.length+1]; ~BE=z:
for(int i=0;i queue[++size]=data; 5^CWF|
fixUp(size); X`-o0HG
} AM#s2.@
} kbbHa_;aqV
S!^I<#d K
private int size=0; RMid}BRE
e? |4O<@
private int[] queue; rd24R-6
<K>qK]|C
public int get() { )jjaY1E
return queue[1]; *iyc,f^w
} -q nOq[
l%?()]y
public void remove() { _fHj8- s/
SortUtil.swap(queue,1,size--); Q)8I(*
fixDown(1); ;RQ}OCz9}8
} *D`$oK,U
file://fixdown znIS2{p/`
private void fixDown(int k) { MOi1+`kwh
int j; [9F
while ((j = k << 1) <= size) { ~\<L74BB
if (j < size %26amp;%26amp; queue[j] j++; Q~rE+?n9F
if (queue[k]>queue[j]) file://不用交换 u%=2g'+)_
break; b?,=|H
SortUtil.swap(queue,j,k); zH#urF6<
k = j; [dqh-7
} k%aJ%(
} U8,pe;/ln`
private void fixUp(int k) { cJM.Q_I}Y
while (k > 1) { ]*Kv[%r07c
int j = k >> 1; ~]n=TEJ>
if (queue[j]>queue[k]) 7?);wh7`
break; kE[R9RS!
SortUtil.swap(queue,j,k); hZ"Sqm]
k = j; ~]'yUd1gSZ
} mMO]l(a&
} M 5`hMfg
A5_r(Z-5
} IlB*JJnl
)HX(-"c
} Dz8aJ6g
|=V~CQ]
SortUtil： FJT0lC
)l`VE_(|
package org.rut.util.algorithm; I<+:Ho=6
d"Zyc(Jk
import org.rut.util.algorithm.support.BubbleSort; 1y,/|Y
import org.rut.util.algorithm.support.HeapSort; s%RG_"l
import org.rut.util.algorithm.support.ImprovedMergeSort; dfZ`M^NU
import org.rut.util.algorithm.support.ImprovedQuickSort; dQO5
import org.rut.util.algorithm.support.InsertSort; $\M];S=CY
import org.rut.util.algorithm.support.MergeSort; JC;&]S.
import org.rut.util.algorithm.support.QuickSort; Py?Q::
import org.rut.util.algorithm.support.SelectionSort; _>8Q{N\- {
import org.rut.util.algorithm.support.ShellSort; JY~CMR5#.O
jX^_(Kg
/** oY7jj=z#T
* @author treeroot eo.B0NZsF
* @since 2006-2-2 su3Wk,MLP
* @version 1.0 bfy=
*/ #&%>kfeJ)<
public class SortUtil { w"?RbA
public final static int INSERT = 1; QZ*gR#K]Sz
public final static int BUBBLE = 2; RdNLf
public final static int SELECTION = 3; QX-n l~
public final static int SHELL = 4; }]JHY P\
public final static int QUICK = 5; ~@#a*="
public final static int IMPROVED_QUICK = 6; _rmKvSD%
public final static int MERGE = 7; !(Y,2{
public final static int IMPROVED_MERGE = 8; 'S:$4j
public final static int HEAP = 9; 2gR*]?C*
c5:X$k\
public static void sort(int[] data) { E]=>@EX
sort(data, IMPROVED_QUICK); aPQxpK?
} ?-)v{4{s
private static String[] name={ -Zp BYX5e_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e+MQmWA'F
}; |68k9rq
ia_lP
private static Sort[] impl=new Sort[]{ d`~~Ww1
new InsertSort(), Iga#,k+%
new BubbleSort(), UM<s#t`\3
new SelectionSort(), Lw%_xRn)
new ShellSort(), \PcnD$L
new QuickSort(), +_+j"BT
new ImprovedQuickSort(), mrr~#Bb>
new MergeSort(), t[@>u'YKt
new ImprovedMergeSort(), e[0"x.gu
new HeapSort() Rd|8=`)
}; "F6gV;{Bt
J0oeCb
public static String toString(int algorithm){ )ax>*
return name[algorithm-1]; 9C0#K\
} iq[IZdza
*>1^q9M
public static void sort(int[] data, int algorithm) { ._Ww
impl[algorithm-1].sort(data); RBBmGZ
} `b%lojT.
#qpP37G
public static interface Sort { ic"8'Rwb
public void sort(int[] data); C,GZ
} ;{q*
D9?.Ru0.
public static void swap(int[] data, int i, int j) { P;mp)1C
int temp = data; -;J6S
data = data[j]; xwi6#>
data[j] = temp; S(?A3 H
} B?- poB&
} $/B~bJC