[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; N2% :h;tf
} ?y46o2b*)
int i1=l; ZBC@xM&-
int i2=mid+1; /L$NE$D} "
for(int cur=l;cur<=r;cur++){ r*]uR /Z$
if(i1==mid+1) 8 #Fh>
data[cur]=temp[i2++]; Wxc^_iqA1
else if(i2>r) h&P {p _Y
data[cur]=temp[i1++]; Zsgi{
else if(temp[i1] data[cur]=temp[i1++]; #?Wo <]i
else fRFYJFc n
data[cur]=temp[i2++]; "5h_8k~sQ
} x*J|i4
} Y6a$gXRT
lU&Q^Zj`
} I^@.Awt
mQL8QW[c
改进后的归并排序: V>r j$Nc]
5)8.
package org.rut.util.algorithm.support; 0NrTJ R`
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import org.rut.util.algorithm.SortUtil; 7g8B'ex J
aTX]+tBoe
/** Bqp&2zg)@
* @author treeroot w0X$rl1
* @since 2006-2-2 boIVU`F-!
* @version 1.0 d _uFY:
*/ C6CGj8G
public class ImprovedMergeSort implements SortUtil.Sort { w~n kNqm
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private static final int THRESHOLD = 10; `[&v
(<n>EF#
/* O[L\T
* (non-Javadoc) #]igB9Cf)w
* rCkYfTYI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }.OxJ=M
*/ h>.9RX &
public void sort(int[] data) { pb6 Q?QG,
int[] temp=new int[data.length]; Z+Xc1W^
mergeSort(data,temp,0,data.length-1); M",];h(I6(
} 1-/4Y5?}
sb 8dc
private void mergeSort(int[] data, int[] temp, int l, int r) { -h=c=P
int i, j, k; 6Z$b?A3zM
int mid = (l + r) / 2; V.U|OQouT
if (l == r) y6bjJ}
return; Ty.drM
if ((mid - l) >= THRESHOLD) }\U0[x#q
mergeSort(data, temp, l, mid); 5qeT4| Ol
else ;*_I,|A:Xr
insertSort(data, l, mid - l + 1); 9wzg{4/-$
if ((r - mid) > THRESHOLD) wqf&i^_
mergeSort(data, temp, mid + 1, r); tG_-;03<`4
else WVinP(#nfM
insertSort(data, mid + 1, r - mid); B JU*`Tx
9Y\F53p&j
for (i = l; i <= mid; i++) { aam1tm#Q
temp = data; -}NAb^d
} [O [FCn
for (j = 1; j <= r - mid; j++) { '8L(f w{k
temp[r - j + 1] = data[j + mid]; :C>J-zY
} *TJ<
int a = temp[l]; q;IhLBl'
int b = temp[r]; |HNQ|r_5S
for (i = l, j = r, k = l; k <= r; k++) { MwN1]d|6
if (a < b) { HK^a:BI
data[k] = temp[i++]; <nf=SRZ
a = temp; ?!R%o
} else { {7/A
data[k] = temp[j--]; 1`nc8qC
b = temp[j]; xcsFODx~
} >c&4_?d&,A
} H7y&N5.V
} /E;;j9
IruyE(;HS
/** G3oxa/mO
* @param data #*[,woNk
* @param l 2lX[hFa5
* @param i dE+CIjW5
*/ 9UB??049z
private void insertSort(int[] data, int start, int len) { 2&suo!ig
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {_": /A
} <XU8a:w'T
} h5<T.vV
} h 3eGq:!9
} Xqc'R5Cw
X S6]C{
堆排序： f2BS[$oV4
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package org.rut.util.algorithm.support; ;GiI'M
nLzX Z6JlU
import org.rut.util.algorithm.SortUtil; _-g-'Hr+N
*Pa2bY3:
/** #rqyy0k0'h
* @author treeroot {yGZc3e1j
* @since 2006-2-2 Kc%tnVyGh:
* @version 1.0 {vf+sf^^q
*/ G~Sy&XJuq
public class HeapSort implements SortUtil.Sort{ aOaF&6'j
N02zPC 8
/* (non-Javadoc) %ZJ),9+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ';i"?D?NAk
*/ Y8x(#qp,
public void sort(int[] data) { hWl""66+5
MaxHeap h=new MaxHeap(); K7)j
h.init(data); ,Zf :R
for(int i=0;i h.remove(); Y*]l|)a6_]
System.arraycopy(h.queue,1,data,0,data.length); =U)n`#6_j2
} IwZZewb-a
qz-#LZFTR
private static class MaxHeap{ &':UlzG
/zChdjz
void init(int[] data){ t;Fbt("]:
this.queue=new int[data.length+1]; COxZ Q
for(int i=0;i queue[++size]=data; @n5;|`)\
fixUp(size); $8<j5%/ $M
} GapX$Jb,p
} zav*
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private int size=0; HV#?6,U}
Ek gZxT_&
private int[] queue; Pu/-Qpqh
(cPeee%Q
public int get() { Hsd|ka$x>
return queue[1]; *l-Dh:
} U*`
*K0j5dx
public void remove() { *DPTkMQN
SortUtil.swap(queue,1,size--); EF*oPn0|
fixDown(1); R#[QoyJ
} ?15POY ?Z
file://fixdown "jkw8UVz
private void fixDown(int k) { QZ:]8MHl]
int j; < -@,
while ((j = k << 1) <= size) { a#OhWqu$
if (j < size %26amp;%26amp; queue[j] j++; Vq)|gF[6i
if (queue[k]>queue[j]) file://不用交换 #`YxoY`
break; z=- 8iks|
SortUtil.swap(queue,j,k); [[.&,6
k = j; -KJ}.q>upq
} ` $QzTv
} ~/]\iOL
private void fixUp(int k) { GlV-}5W
while (k > 1) { ;%b <uV
int j = k >> 1; \'}/&PCkr
if (queue[j]>queue[k]) jL>I5f
break; N9>'/jgZX
SortUtil.swap(queue,j,k); Jq$6$A,f
k = j; softfjl&l
} '.}6]l
} yNb#Ia
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} .:r2BgL
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} \( Gf+
],fwZd[t
SortUtil： ~#N.!e4
>%jEo'0;_
package org.rut.util.algorithm; 3;-@<9
Jnu}{^~
import org.rut.util.algorithm.support.BubbleSort; rSc,\upz
import org.rut.util.algorithm.support.HeapSort; a?xq*|?
import org.rut.util.algorithm.support.ImprovedMergeSort; bH)8UQR%
import org.rut.util.algorithm.support.ImprovedQuickSort; 5{!a+
import org.rut.util.algorithm.support.InsertSort; /pSUn"3
import org.rut.util.algorithm.support.MergeSort; /v|68x6
import org.rut.util.algorithm.support.QuickSort; FS]+s>
import org.rut.util.algorithm.support.SelectionSort; MK!]y8+Z
import org.rut.util.algorithm.support.ShellSort; Ztpm_P6
c9cphZ(z
/** {C,1w
* @author treeroot yv#c=v|
* @since 2006-2-2 J _[e9
* @version 1.0 R"\ub"]
*/ C&d"#I
public class SortUtil { B'lxlYV1
public final static int INSERT = 1; .9[8H:Fe
public final static int BUBBLE = 2; xTksF?u)
public final static int SELECTION = 3; t3yQ/
public final static int SHELL = 4; 8wH41v67F
public final static int QUICK = 5; zDGg\cPj9
public final static int IMPROVED_QUICK = 6; k_|v)\4B
public final static int MERGE = 7; wr;|\<c
public final static int IMPROVED_MERGE = 8; 8n."5,P
public final static int HEAP = 9; Ep,0Z*j
5LhJ8$W
public static void sort(int[] data) { x":Bw;~
sort(data, IMPROVED_QUICK); =J[[>H'<d
} GqK&'c
private static String[] name={ G,mH!lSm,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~gLEhtW
}; w'zO(6 `
Fh!!T%5>C
private static Sort[] impl=new Sort[]{ \aJ-q?=
new InsertSort(), bTy'5"
new BubbleSort(), 3Mh,NQB
new SelectionSort(), /PB3^d>Q2
new ShellSort(), 61Iy{-/ZV
new QuickSort(), >I8hFtAM
new ImprovedQuickSort(), }5Tyzi(
new MergeSort(), @qr3v>3X<
new ImprovedMergeSort(), E't G5,/m
new HeapSort() _.J[w6
}; ,j(p}t
luxKgcU
public static String toString(int algorithm){ &L~31Ayj&
return name[algorithm-1]; )(|0KarF
} /NN[gz
,h(f\h(9
public static void sort(int[] data, int algorithm) { JXy667_
impl[algorithm-1].sort(data); /K<GN7vN
} v BeU
C$re$9U
public static interface Sort { yM#trqv5
public void sort(int[] data); 5, "^"*@<
} -z~ V
3PR7g
public static void swap(int[] data, int i, int j) { ~bWWu`h
int temp = data; id[>!fQ=Y
data = data[j]; pil*/&pB
data[j] = temp; h C`p<jp/
} B| 0s4E
} j C1^>D