[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; rX#}2
} a{6rQ
int i1=l; d(L u|/~
int i2=mid+1; b='YCa
for(int cur=l;cur<=r;cur++){ NY ZPh%x
if(i1==mid+1) ?8X+)nU@
data[cur]=temp[i2++]; T(^<sjOs
else if(i2>r) p' FYK|
data[cur]=temp[i1++]; }cE,&n
else if(temp[i1] data[cur]=temp[i1++]; .;n<k
else V4!RUqK
data[cur]=temp[i2++]; :R<n{%~
} -_ [Z5%B
} dt 4_x1
#IP<4"Hf
} w7"Z@$fs
#{l+I(M
改进后的归并排序: ![iAALPNl
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package org.rut.util.algorithm.support; D;|4ZjM-
c)M_&?J!5
import org.rut.util.algorithm.SortUtil; !G#3jh:kiY
_~DFZt@T
/** VWG#v#o
* @author treeroot Mnaoh:z
* @since 2006-2-2 #uT-_L}sw
* @version 1.0 1k\1U
*/ W]n%$a
public class ImprovedMergeSort implements SortUtil.Sort { gRKmfJ*u
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private static final int THRESHOLD = 10; 0%+TU4Xx
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/* ab' f:
* (non-Javadoc) ~/hP6*
* ^c^9kK'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?PSm) ~Oa
*/ &S<tX]v
public void sort(int[] data) { `yHV10
int[] temp=new int[data.length]; oHbEHS61
mergeSort(data,temp,0,data.length-1); ~y^#?;
} .dVo[m;
aIZ@5w"7
private void mergeSort(int[] data, int[] temp, int l, int r) { M>0=A
int i, j, k; cu|#AW
int mid = (l + r) / 2; U^~K-!0
if (l == r) +8Zt<snG
return; ;vF8V`f
if ((mid - l) >= THRESHOLD) *n2Q_o
mergeSort(data, temp, l, mid); >3X!c"#l
else o 1#XM/Z
insertSort(data, l, mid - l + 1); RWXj)H)w
if ((r - mid) > THRESHOLD) L;5jhVy
mergeSort(data, temp, mid + 1, r); Sy'/%[+goJ
else FymA_Eq
insertSort(data, mid + 1, r - mid); /%rbXrR4w
z(>{"t<C
for (i = l; i <= mid; i++) { @iy ^a
temp = data; =6j 5,
} hX 9.%-@sR
for (j = 1; j <= r - mid; j++) { 1U~AupHE
temp[r - j + 1] = data[j + mid]; ]^&DEj{
} ]<4Yor}t{;
int a = temp[l]; CjOaw$s
int b = temp[r]; #:vosVqG
for (i = l, j = r, k = l; k <= r; k++) { 2sy{
if (a < b) { [lQp4xgxi
data[k] = temp[i++]; X`:(-3T
a = temp; Q9 kKk
} else { u|WX?@\
data[k] = temp[j--]; omECes)
b = temp[j]; I4 Tc&b
} JQsS=m7Et
} ?;|$R
} +sE81B
Gc4N)oq)}b
/** wv ,F>5P
* @param data mh.0% 9`9
* @param l WaN0$66[:
* @param i gO4J[_
*/ !o:RIwS3
private void insertSort(int[] data, int start, int len) { 5D-xm$8C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {;Mcor3
} zEF3B
} (Y, @-V
} 2*Z~JM
} QCa$<~c
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堆排序： ]![ewO@
f&8&UL>e`
package org.rut.util.algorithm.support; [ #A!B#`
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import org.rut.util.algorithm.SortUtil; `8xe2=Ub
/_x?PiL
/** = Yh>5A
* @author treeroot *FK!^Y
* @since 2006-2-2 Qgo0uuM
* @version 1.0 4eBM/i
*/ 8cfxKUS
public class HeapSort implements SortUtil.Sort{ <|hvH
O#Xq0o
/* (non-Javadoc) F{]dq/{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <z%zzc1s
*/ lb{*,S
public void sort(int[] data) { bzk@6jR1
MaxHeap h=new MaxHeap(); e]uk}#4
h.init(data); {{SQL)yJ
for(int i=0;i h.remove(); Cj_cu
System.arraycopy(h.queue,1,data,0,data.length); Rw^4S@~T
} *vCJTz
SL pd~ZC?
private static class MaxHeap{ >Ah [uM
="d}:Jl
void init(int[] data){ 3)atqM)i
this.queue=new int[data.length+1]; MHI0>QsI
for(int i=0;i queue[++size]=data; Xv]O1fcI
fixUp(size); g>/,},jv[x
} y''`73U"
} IObGmc
]hS4'9lD
private int size=0; \uQ(-ji
3"6lPUS
private int[] queue; *]W{83rXQ
F.c,FR2
public int get() { \n6#D7OV
return queue[1]; xs.>+(@|;
} ,wlFn
9Fv1D
public void remove() { l<(MC R*
SortUtil.swap(queue,1,size--); +]Po!bN@@
fixDown(1); 3-lJ]7OT
} ucL}fnY1
file://fixdown C6M|A3^T
private void fixDown(int k) { {tOu+zy
int j; rNO'0Ck=
while ((j = k << 1) <= size) { ">v76%>Z7
if (j < size %26amp;%26amp; queue[j] j++; F7Mf>."
if (queue[k]>queue[j]) file://不用交换 DJS0;!# |O
break; ymrmvuh
SortUtil.swap(queue,j,k); qTj7mUk
k = j; g`d5OHvOo
} CJz2.yd
} /[q6"R!uMz
private void fixUp(int k) { K#%L6=t$<
while (k > 1) { ?k TVC
int j = k >> 1; Rf^$?D&^
if (queue[j]>queue[k]) "n^h'// mn
break; Q]S~H+eRy
SortUtil.swap(queue,j,k); f<=<:+
k = j; 4&r[`gL
} ?w#V<3=
} AME3hA
F@1~aeX-
} g j8rrd|
Aq yR+
} Qj.]I0d
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SortUtil： ` .|JTm[
f=+|e"i#p
package org.rut.util.algorithm; umaF}}-Q{
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import org.rut.util.algorithm.support.BubbleSort; d&BocJ
import org.rut.util.algorithm.support.HeapSort; NoTEbFrV
import org.rut.util.algorithm.support.ImprovedMergeSort; eee77.@y-p
import org.rut.util.algorithm.support.ImprovedQuickSort; P"Lk(gY
import org.rut.util.algorithm.support.InsertSort; ;R|i@[(J
import org.rut.util.algorithm.support.MergeSort; 2&MIt(\-
import org.rut.util.algorithm.support.QuickSort; Ebw1 %W KC
import org.rut.util.algorithm.support.SelectionSort; sD H^l)4h
import org.rut.util.algorithm.support.ShellSort; QkS~~|0EI>
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/** Y~gDS^8
* @author treeroot 9>yLSM,!rS
* @since 2006-2-2 @}eEV[Lli
* @version 1.0 /j/,@,lw7z
*/ 7|%|w
public class SortUtil { I@Pp[AyG
public final static int INSERT = 1; 7r;7'X5
public final static int BUBBLE = 2; }(k#,&Fv`
public final static int SELECTION = 3; 3#N'nhUzA
public final static int SHELL = 4; @32~#0a
public final static int QUICK = 5; a~q_2S]h
public final static int IMPROVED_QUICK = 6; l/1u>'
public final static int MERGE = 7; q.0Evr:
public final static int IMPROVED_MERGE = 8; YXz*B5R
public final static int HEAP = 9; > %h7)}U
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public static void sort(int[] data) { Zk,` Iq
sort(data, IMPROVED_QUICK); \d"JYym
} !"1}zeve
private static String[] name={ Loz5[L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,;;7+|`
}; \ #<.&`8B
sZe$?k|
private static Sort[] impl=new Sort[]{ KaVNRS
new InsertSort(), KuBN_bd
new BubbleSort(), F.{{gpI
new SelectionSort(), O2i7w1t
new ShellSort(), zs/4tNXw
new QuickSort(), qt_ocOr
new ImprovedQuickSort(), `HVS}}{a
new MergeSort(), m=Mb'<
new ImprovedMergeSort(), R[_Q}W'HG
new HeapSort() g)?Ol
}; MoAie|MKe
I0iTa99K
public static String toString(int algorithm){ z$g cK>@l
return name[algorithm-1]; l5h+:^#M5c
} /my5s\;s|z
%MG{KG=&o
public static void sort(int[] data, int algorithm) { Vn&{yCm3
impl[algorithm-1].sort(data); x,wXR=H
} @!p bR(8
JJ:pA_uX
public static interface Sort { B":9C'tip
public void sort(int[] data); _V2^0CZ
} M)x6m|.=
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public static void swap(int[] data, int i, int j) { z*V 8l*
int temp = data; u+/Uc:XK)
data = data[j]; In[rxT~K}Q
data[j] = temp; J.EBt3
} m+UWvUB)
} 1.9bU/X