[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; E~}[+X@
} Y1|^>C#a
int i1=l; URk$}_39
int i2=mid+1; +hZ] B<$
for(int cur=l;cur<=r;cur++){ "7:u0p!
if(i1==mid+1) x~%\y
data[cur]=temp[i2++]; 3eJ\aVI>pE
else if(i2>r) fG3wc l~
data[cur]=temp[i1++]; /8:gVXZi
else if(temp[i1] data[cur]=temp[i1++]; BL7>dZOa
else MV9r5|3-
data[cur]=temp[i2++]; |I(%7K
} p0
} UC.8DaIPN
w~ijD ^g
} x4@MO|C
nM=2"`@$
改进后的归并排序: xJ$Rs/9C
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package org.rut.util.algorithm.support; aD0Q0C+
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import org.rut.util.algorithm.SortUtil; `d.Gw+Un
pz.Y=V\t
/** x-tm[x@;o
* @author treeroot ?U=mcdqd
* @since 2006-2-2 gfV]^v
* @version 1.0 6^WiZ^~
*/ Q=^ktKMeR
public class ImprovedMergeSort implements SortUtil.Sort { p!C_:Z5i
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private static final int THRESHOLD = 10; *Rz!i m|
er#8D6*
/* '9f6ZAnYpQ
* (non-Javadoc) 8moUK3w
* | pF5`dX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !Jk(&.
*/ /j`i/Ha1
public void sort(int[] data) { y?[5jL|Ue
int[] temp=new int[data.length]; 7YoofI
mergeSort(data,temp,0,data.length-1); d&O'r[S
} qn5yD!1
&19lk
private void mergeSort(int[] data, int[] temp, int l, int r) { :y4)qF
int i, j, k; cdd P T
int mid = (l + r) / 2; =ZxW8DK
if (l == r) #9URVq,
return; xgZV0!%
if ((mid - l) >= THRESHOLD) xC= y^- 1
mergeSort(data, temp, l, mid); 45]Ym{]
else ;D%$Eh&oma
insertSort(data, l, mid - l + 1); 3?a0 +]
if ((r - mid) > THRESHOLD) lCM6T;2ID
mergeSort(data, temp, mid + 1, r); dt`9RB$
else W;xW: -
insertSort(data, mid + 1, r - mid); Zm"!E6`69
;u4@iN}p
for (i = l; i <= mid; i++) { hY\Eh.
temp = data; /vFxVBX
} L7~+x^kw
for (j = 1; j <= r - mid; j++) { ?^+#pcX]t|
temp[r - j + 1] = data[j + mid]; pko!{,c
} qat45O4A1
int a = temp[l]; _ Yb Eo+
int b = temp[r]; clPZd
for (i = l, j = r, k = l; k <= r; k++) { YyQf
if (a < b) { w>H%[\Qs
data[k] = temp[i++]; T! &[
a = temp; [%gK^Zt
} else { 3B!&ow<rt
data[k] = temp[j--]; Zztt)/6*
b = temp[j]; /xX,
} a"v"n$
} $S($97IU=
} Nqo#sBS
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/** qd#(`%_/
* @param data } kh/mq
* @param l ~PU1vbv9T
* @param i fl5UY$a2-
*/ .,d$%lN
private void insertSort(int[] data, int start, int len) { 0`g}(}'L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <{-(\>f!9
} *pS7/Qe
} o3\SO
} -Y 6.?z
} c'TiWZP~
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堆排序： &<fRej]v
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package org.rut.util.algorithm.support; c4qp3B_w
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import org.rut.util.algorithm.SortUtil; V{AH\IV-
`ykMh>*{
/** |)!k@?_
* @author treeroot *$4A|EA V
* @since 2006-2-2 u75)>^:I
* @version 1.0 %1 VNP(E
*/ ZB_16&2Ow
public class HeapSort implements SortUtil.Sort{ -!bLMLIg
#<WyId(
/* (non-Javadoc) {g:/BFLr#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Ad6~E+aL-
*/ mKf>6/s{c
public void sort(int[] data) { &)"7am(S`
MaxHeap h=new MaxHeap(); $@:>7Y"
h.init(data); '7O{*=`oj
for(int i=0;i h.remove(); kj<D4)
System.arraycopy(h.queue,1,data,0,data.length); u_[4n
} ^*?B)D=,
. ;ea]_Z
private static class MaxHeap{ xJF6l!`
~d#;r5>
void init(int[] data){ u{{xnyl?
this.queue=new int[data.length+1]; x9o^9QJh
for(int i=0;i queue[++size]=data; 8NF;k5
fixUp(size); !+|N<`
} 2 Zjb/
} 9^ *ZH1
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private int size=0; meM.?kk(
8a$jO+UvN
private int[] queue; M:1F@\<
FOUs= E[
public int get() { :86luLFm
return queue[1]; g%q?2Nv
} ,C@hTOT
X^_+%U
public void remove() { p`l[cVQ<
SortUtil.swap(queue,1,size--); \,cKt_{ u
fixDown(1); Cp~3Jm3
} GT\s!D;<
file://fixdown ]x(2}h^S
private void fixDown(int k) { v[yTk[zd0
int j; 3NxaOO`
while ((j = k << 1) <= size) { Hb AMoow!
if (j < size %26amp;%26amp; queue[j] j++; 18w^7!F?~u
if (queue[k]>queue[j]) file://不用交换 <11Tqb
break; 5t5S{aCDr
SortUtil.swap(queue,j,k); feq6!k7
k = j; @01D1A
} W.6JnYLQ&
} uA/.4 b
private void fixUp(int k) { }vxH)U6$q
while (k > 1) { e'?doP
int j = k >> 1; \`%Y-!H+v
if (queue[j]>queue[k]) =!P?/
break; ?VN]0{JSp
SortUtil.swap(queue,j,k); 53+rpU_
k = j; NUNn[c
} 46?F+,Rzl
} at(p,+ %
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} W0T i ^@
=&b$W/l)0
} $J0~2TV<
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SortUtil： 1 GHgwT
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package org.rut.util.algorithm; >=W#z
ZM^;%(
import org.rut.util.algorithm.support.BubbleSort; ?nSp?m;
import org.rut.util.algorithm.support.HeapSort; lnC Wu@{
import org.rut.util.algorithm.support.ImprovedMergeSort; V?J,ab$X#
import org.rut.util.algorithm.support.ImprovedQuickSort; &eS70hq
import org.rut.util.algorithm.support.InsertSort; k42ur)pb
import org.rut.util.algorithm.support.MergeSort; WKJL< D ]:
import org.rut.util.algorithm.support.QuickSort; 8\.1m9&r>o
import org.rut.util.algorithm.support.SelectionSort; XQY&4tK
import org.rut.util.algorithm.support.ShellSort; 2GKU9cV*`
<W%Z_d&Xv
/** u`Qcw|R+
* @author treeroot t7+Ic
* @since 2006-2-2 x)wt.T?eL
* @version 1.0 yGG\[I;7
*/ ,p`bWm
public class SortUtil { 59Q Q_#>
public final static int INSERT = 1; YB1DL^:
public final static int BUBBLE = 2; 2CgIY89O
public final static int SELECTION = 3; <07W&`Dw
public final static int SHELL = 4; `0XbV A
public final static int QUICK = 5; &c9Fw:f;
public final static int IMPROVED_QUICK = 6; P:-/3
public final static int MERGE = 7; E1ob+h:`d
public final static int IMPROVED_MERGE = 8; Ci9wF(<k
public final static int HEAP = 9; BCZnF /Zo
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public static void sort(int[] data) { >upUY(3&
sort(data, IMPROVED_QUICK); <\>ak7m
} 9x^ /kAB
private static String[] name={ L=wFo^N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "v(]"L
}; ];~[Olc
2pNJWYW"
private static Sort[] impl=new Sort[]{ e.ym7L]$O
new InsertSort(), m:O2_%\l
new BubbleSort(), P(nHXVSUE
new SelectionSort(), [#6Esy8|
new ShellSort(), /~huTKA}
new QuickSort(), HF[%/Tu
new ImprovedQuickSort(), 4m!3P"$
new MergeSort(), poFjhq /#(
new ImprovedMergeSort(), tUF]f6
new HeapSort() &0Zk3D4
}; KBHKcFk
FH(+7Lz4;
public static String toString(int algorithm){ WvzvGT=
return name[algorithm-1]; =d.W'q|
} k#NMD4(%O
<G?85*Nv_
public static void sort(int[] data, int algorithm) { )^#Zg8L
impl[algorithm-1].sort(data); < ^!eaBR4
} Ki;5 =)
\#7%%>p=O'
public static interface Sort { vm}.gQ
public void sort(int[] data); MJpTr5Vs
} ']e4!
^F9zS`Yz2
public static void swap(int[] data, int i, int j) { b=\3N3OX
int temp = data; qA/3uA!z
data = data[j]; i j;'4GzQL
data[j] = temp; TiEJyd`P
} EoWzHa
} eG>Fn6G<g