[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; &CFHH"OsT
} <DCrYt!1}c
int i1=l; J A ]s
int i2=mid+1; /z*?:*
for(int cur=l;cur<=r;cur++){ X6/k `J
if(i1==mid+1) hp!UW
data[cur]=temp[i2++]; [Zk|s9
else if(i2>r) v"Fa_+TVx
data[cur]=temp[i1++]; AS[cz! >
else if(temp[i1] data[cur]=temp[i1++]; 'c\zWmAZ
else -#H>kbs
data[cur]=temp[i2++]; :Q=Jn?Gjb
} 67Z|=B!7
} %zyO}
ig]*Z
} vAi kd#C)
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改进后的归并排序: l njaHol0
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package org.rut.util.algorithm.support; W~ XJ']e
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import org.rut.util.algorithm.SortUtil; J_OIU#-B
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/** /NaIMo5
* @author treeroot `9Zoq=/
* @since 2006-2-2 {e A4y~k
* @version 1.0 iV[g.sP-
*/ !-%i" a
public class ImprovedMergeSort implements SortUtil.Sort { ^wCjMi(sj
$ckX H,l_
private static final int THRESHOLD = 10; 8*I43Jtlf,
"?hEGJ;m"
/* kN>%y&cK
* (non-Javadoc) /cUcfe#X
* V}=9S@$o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0F6^[osqtl
*/ UMuqdLaT9
public void sort(int[] data) { ?N<* ATCL
int[] temp=new int[data.length]; :O)\v!Z
mergeSort(data,temp,0,data.length-1); .a1WwI
} W~k"`g7uu
\@vR*E
private void mergeSort(int[] data, int[] temp, int l, int r) { Wo2TU!
int i, j, k; LX'.up11X5
int mid = (l + r) / 2; }BS.OK?
if (l == r) O E0w/{
return; s\,F6c
if ((mid - l) >= THRESHOLD) A1zM$ wDU
mergeSort(data, temp, l, mid); \:]Clvc
else _>%P};G{>
insertSort(data, l, mid - l + 1); ?Ko)AP
if ((r - mid) > THRESHOLD) la>:%SD
mergeSort(data, temp, mid + 1, r); N|Xx#/
else 3~}G~ t
insertSort(data, mid + 1, r - mid); kB{
mufi>}
for (i = l; i <= mid; i++) { ^AdHP!I
temp = data; Ikql
} |} ;&xI
for (j = 1; j <= r - mid; j++) { \:9dt8(-U
temp[r - j + 1] = data[j + mid]; %bgjJ`
} m.e+S,i
int a = temp[l]; S#6{4x4
int b = temp[r]; :0x,%V74_!
for (i = l, j = r, k = l; k <= r; k++) { O|=5+X
if (a < b) { bhDV U(%I6
data[k] = temp[i++]; 6z=h0,Y}
a = temp; .|iMKRq
} else { ~A2{$C
data[k] = temp[j--]; 8TGO6oY+=
b = temp[j]; bD*V$w*P
} U>?q|(u
} 8\HL8^6c5
} &NZl_7PL
;[TC`DuNj0
/** 8}z]B^?Fy
* @param data 'RK.w^
* @param l =&G<^7
* @param i JoeU J3N
*/ @zo}#.g
private void insertSort(int[] data, int start, int len) { &HBqweI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jN 9|q
} l?Vm/YXb
} FeOo;|a
} HYm |
} DT *'r;
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堆排序： FN jT?*
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package org.rut.util.algorithm.support; QcQQQM
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import org.rut.util.algorithm.SortUtil; b-4gHW
Tk~RT<\Ab+
/** J|4q9$
* @author treeroot GVS-_KP\
* @since 2006-2-2 8 Z|c!QIU
* @version 1.0 qZw4"&,j$
*/ \i1>/`F
public class HeapSort implements SortUtil.Sort{ }#0MJ6L
d'j8P
/* (non-Javadoc) ,K4*0!TXP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '2)c;/-E
*/ h M{&if
public void sort(int[] data) { V.<$c1#=$
MaxHeap h=new MaxHeap(); ~yacJU=
h.init(data); 0LI:R'P+P[
for(int i=0;i h.remove(); MV8Lk/zd?A
System.arraycopy(h.queue,1,data,0,data.length); 'zYKG5A
} ?naPti1GX
Mou@G3
private static class MaxHeap{ $BIQ#T>qK
'p0|wM_
void init(int[] data){ Xxl>,QUA
this.queue=new int[data.length+1]; 4a'O#;ho
for(int i=0;i queue[++size]=data; !r=^aa(\
fixUp(size); 9{OH%bF
} bpe8 `b(#
} t:A,pT3
?gZJ v
private int size=0; "v.]s;g
G`!ff
private int[] queue; %y@iA91K
3,`.$
public int get() { ]J=S\
return queue[1]; w8~J5XS
} [w iI
>)Ih[0~M
public void remove() { w1zI"G~4/Q
SortUtil.swap(queue,1,size--); ]U :1NC"
fixDown(1); NW-l_]k
} HSt|Ua.c/h
file://fixdown V<} ^n
private void fixDown(int k) { Salu[)+?
int j; 6{O#!o*g
while ((j = k << 1) <= size) { >.R6\>N%
if (j < size %26amp;%26amp; queue[j] j++; ?nm:e.S+?
if (queue[k]>queue[j]) file://不用交换 8ad!.
break; cQ4TYr;?
SortUtil.swap(queue,j,k); Ru%: z>Y
k = j; Kuh! b`9
} vFfvvRda4x
} 0Sz&Oguv
private void fixUp(int k) { <`dF~
while (k > 1) { V/5hEoDt
int j = k >> 1; Z$R2Z$f
if (queue[j]>queue[k]) #Id.MLHxA_
break; ht^U VV2
SortUtil.swap(queue,j,k); l<<G".?
k = j; `92 D]^g
} CvpqQ7&k7
} Ow\9vf6H
;WIL?[;w
} *$(=I6b
v9~Hl
} `w Sg/
FV/xp}nz
SortUtil： $ql-"BB
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package org.rut.util.algorithm; \Rn.ug
ADX}
import org.rut.util.algorithm.support.BubbleSort; \h^bOxh
import org.rut.util.algorithm.support.HeapSort; ,8uu,,c
import org.rut.util.algorithm.support.ImprovedMergeSort; $52Te3n
import org.rut.util.algorithm.support.ImprovedQuickSort; TJY$<:
import org.rut.util.algorithm.support.InsertSort; gb:Cc,F,%
import org.rut.util.algorithm.support.MergeSort; yZ&By?.0
import org.rut.util.algorithm.support.QuickSort; /2u;w!oi.
import org.rut.util.algorithm.support.SelectionSort; SX}GKu
import org.rut.util.algorithm.support.ShellSort; hBsjO3n
)EO/P+&
/** 7>{edNy!,
* @author treeroot P's<M
* @since 2006-2-2 #)R;6"
* @version 1.0 i/xPO
*/ 0jv9N6IM
public class SortUtil { @n(=#Q3
public final static int INSERT = 1; $#4z>~0
public final static int BUBBLE = 2; | 7>1)
public final static int SELECTION = 3; :&)RK~1m_
public final static int SHELL = 4; hl~(&D1^
public final static int QUICK = 5; u\qyh9s
public final static int IMPROVED_QUICK = 6; Z-4A`@p
public final static int MERGE = 7; 3:Co K#
public final static int IMPROVED_MERGE = 8; Op3 IL/
public final static int HEAP = 9; v,>F0ofJ
#Mbt%m
public static void sort(int[] data) { W&06~dI1!
sort(data, IMPROVED_QUICK); =< CH(4!
} SATZ!
private static String[] name={ V2/+SvB2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rvE!Q=y~
}; hQGZrZK#
e^'?:j
private static Sort[] impl=new Sort[]{ ^ioTd
new InsertSort(), iI&SI#; _
new BubbleSort(), 1Y9Ye?~jd
new SelectionSort(), [RpFC4W
new ShellSort(), }Pb!u9_
new QuickSort(), '&<-,1^L
new ImprovedQuickSort(), 5 (H; x74
new MergeSort(), * n!0
new ImprovedMergeSort(), /@#)j( eY/
new HeapSort() ; wHuL\
}; g"Ii'JZ?
Fah}#,
public static String toString(int algorithm){ P`bR;2o
return name[algorithm-1]; RTl7vzG
} J"83S*2(j
>a4Bfnf"eI
public static void sort(int[] data, int algorithm) { jB1\L<P
impl[algorithm-1].sort(data); v>R.M"f
} k6Tpaf^
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public static interface Sort { =kc{Q@Dk
public void sort(int[] data); Cza)s
} " c
/Cg/Rwl
public static void swap(int[] data, int i, int j) { U_8I$v-~
int temp = data; *(k=!`4(
data = data[j]; 8v6rS-iHP
data[j] = temp; qJ!oH&/cD
} &YMVoyVD
} x<3vA|o