[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; *[yCcqN.
} qKO\;e*
int i1=l; qU2>V
int i2=mid+1; C7+TnJ
for(int cur=l;cur<=r;cur++){ %],.?TS2V
if(i1==mid+1) 'R=o,=
data[cur]=temp[i2++]; &I!2gf
else if(i2>r) NoYu"57\
data[cur]=temp[i1++]; zo\XuoZ
else if(temp[i1] data[cur]=temp[i1++]; ?LNwr[C0
else oY.JK
data[cur]=temp[i2++]; 4F:RLj9P!
} L</"m[
} o@pM??&x
Rut6m5>
} / m?Z!
j/Bzbjq"
改进后的归并排序: 5@Py`
Nr(WbD[T
package org.rut.util.algorithm.support; 8sbS7*#
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import org.rut.util.algorithm.SortUtil; !%@n067
5utj$ha2
/** ^`dp!1.+
* @author treeroot O^:Pr8|{J
* @since 2006-2-2 -OkKLub
* @version 1.0 s}?98?tYB
*/ slQKkx \Dn
public class ImprovedMergeSort implements SortUtil.Sort { Kw?,A
W%h<@@c4,
private static final int THRESHOLD = 10; 9Hc#[Ml
9MXauTKI
/* C)ChF`Ru':
* (non-Javadoc) 5/*ZqrJw{"
* }%XNB1/`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'QW 0K]il
*/ Q kQd;y
public void sort(int[] data) { 6Jj)[ R\5=
int[] temp=new int[data.length]; ?_tOqh@in
mergeSort(data,temp,0,data.length-1); #bdJ]v.n
} )m)>k` 0
uNRGbDMA=
private void mergeSort(int[] data, int[] temp, int l, int r) { 3(PU=
int i, j, k; qmL!"ZRLF
int mid = (l + r) / 2; :nXBw%0x
if (l == r) `b%/.%]$
return; G&n_vwZ%
if ((mid - l) >= THRESHOLD) KY"~Ta`
mergeSort(data, temp, l, mid); foJ|Q\Z,T
else #o^E1cI
insertSort(data, l, mid - l + 1); zzW^AvR
if ((r - mid) > THRESHOLD) #Ta@A~.L
mergeSort(data, temp, mid + 1, r); d+^4;Hv4
else JTs.NY <z
insertSort(data, mid + 1, r - mid); fi,=z
94lmsE
for (i = l; i <= mid; i++) { L$ ON=$q5
temp = data; Nvew^c)x
} 6U""TR!
for (j = 1; j <= r - mid; j++) { ] 2b@mX
temp[r - j + 1] = data[j + mid]; ?3zx?>sG
} 4l3N#U0Q
int a = temp[l]; twN(]w}Ps|
int b = temp[r]; CRqa[boU*
for (i = l, j = r, k = l; k <= r; k++) { =oHJ_
if (a < b) { };KmMpBn
data[k] = temp[i++]; S%T1na^x
a = temp; 4a646jg)
} else { (h%wO
data[k] = temp[j--]; i$NnHj|
b = temp[j]; jgO{DNe(=
} 67sb D<r
} )1]C%)zn
} @rJ#Dr
k~hL8ZT[
/** > voUh;L
* @param data Z'fy9
* @param l zf S<X
* @param i eVlI:yqppj
*/ #Gg^fm
private void insertSort(int[] data, int start, int len) { 'x18F#g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X F40;urm
} \Lc]6?,R
} HmiwpI
} :c.i Z
} k&?QeXW
yT,UM^'
堆排序： NCsUC
r%a$u%)oD
package org.rut.util.algorithm.support; ;x7SY;0*
>AfJxdd1
import org.rut.util.algorithm.SortUtil; J{1O\i
p1D-Q7F
/** !C+25vup
* @author treeroot Wx-{F
* @since 2006-2-2 J7maG|S(DF
* @version 1.0 h*KhH>\
*/ hFjW.~B
public class HeapSort implements SortUtil.Sort{ @Ab<I
v>e4a/
/* (non-Javadoc) +HcH]D;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m[7a~-3:J
*/ E7D^6G&i
public void sort(int[] data) { R.fRQ>rI
MaxHeap h=new MaxHeap(); . =+7H`A
h.init(data); %8-S>'g'
for(int i=0;i h.remove(); C[s*Na-
System.arraycopy(h.queue,1,data,0,data.length); m7@`POI
} kOc'@;_O
A} "*`y
private static class MaxHeap{ <37vWK1+
SVpe^iQ]1\
void init(int[] data){ !6}Cs3.
this.queue=new int[data.length+1]; ht-6_]+ME
for(int i=0;i queue[++size]=data; ]#qdA(Kl
fixUp(size); _Yhpj}KZ
} un\^Wmbw
} C/w;g3
~Ch`A@=5
private int size=0; JxWHrsh[
bH.">IV
private int[] queue; 4EELaP|%
HWd,1
public int get() { D"Xm9 (
return queue[1]; R5FjJ>JE
} mB,7YZv
|~/{lE=I
public void remove() { 6`s[PKP.
SortUtil.swap(queue,1,size--); r*$"]{m}
fixDown(1); k^L (q\D
} jC@^/rMh
file://fixdown l)|CPSN?w
private void fixDown(int k) { vB,N6~r>
int j; 6SmSu\lgV
while ((j = k << 1) <= size) { :[rx|9M6
if (j < size %26amp;%26amp; queue[j] j++; 'X?`+2wK
if (queue[k]>queue[j]) file://不用交换 o+vf
break; #A/jGv^
SortUtil.swap(queue,j,k); ~<eiWDf
k = j; 3! +5MsR+
} (5I]umtge
} m1<B6*iG"
private void fixUp(int k) { );6zV_^!
while (k > 1) { 3646.i[D
int j = k >> 1; (>jME
if (queue[j]>queue[k]) |#sP1w'l]
break; Vr^wesT\Hx
SortUtil.swap(queue,j,k); N8vWwN[3
k = j; dYsqF 3f
} \i&yR]LF
} yJrPb"
s)L7o)56/
} LY|h*a6Ym
J^W.TM&q$,
} 1idEm*3&(
:{fsfZXXr
SortUtil： q4Z\y
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package org.rut.util.algorithm; !1l2KW<be
dfrq8n]
import org.rut.util.algorithm.support.BubbleSort; !!QMcx_C#/
import org.rut.util.algorithm.support.HeapSort; EmH{G
import org.rut.util.algorithm.support.ImprovedMergeSort; 5GY%ZRHh
import org.rut.util.algorithm.support.ImprovedQuickSort; hZFbiGQr\
import org.rut.util.algorithm.support.InsertSort; !pN,,H6Y
import org.rut.util.algorithm.support.MergeSort; U/ZbE?it>
import org.rut.util.algorithm.support.QuickSort; mA4v 4z
import org.rut.util.algorithm.support.SelectionSort; 4j | vzyc
import org.rut.util.algorithm.support.ShellSort; lDH0bBmd0
h!Ka\By8#
/** ve.4""\a
* @author treeroot +F/'+
* @since 2006-2-2 w&H ?;1
* @version 1.0 ;?y?s'>t&
*/ REt()$ 7~
public class SortUtil { `KL`^UqR
public final static int INSERT = 1; Mz06cw&
public final static int BUBBLE = 2; !98s[)B:
public final static int SELECTION = 3; ,4\vi|
public final static int SHELL = 4; -ZuzJAA
public final static int QUICK = 5; eL(T
public final static int IMPROVED_QUICK = 6; X23TS`
public final static int MERGE = 7; :?S2s Ne2
public final static int IMPROVED_MERGE = 8; 2"mO"2d%
public final static int HEAP = 9; /0r2v/0
RFZrcM
public static void sort(int[] data) { H"-p^liw
sort(data, IMPROVED_QUICK); 9+/<[w7
} Hp,r @
private static String[] name={ 2M;{|U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mr/^lnO
}; 1xx-}AIH#
T.{I~_
private static Sort[] impl=new Sort[]{ tVe*J@i\$
new InsertSort(), ,:#prT[P"
new BubbleSort(), "16==tLFE
new SelectionSort(), sz)3 z
new ShellSort(), F;z FKvn
new QuickSort(), D~1nh%x_
new ImprovedQuickSort(), ;Y~;G7
new MergeSort(), bc&:v$EGy
new ImprovedMergeSort(), n,0}K+}
new HeapSort() 0zEn`rq&
}; ou(9Qf zN
R~tv?hP
public static String toString(int algorithm){ UyJ5}fBJ
return name[algorithm-1]; jR48.W
} _2TIan}
eF2<L[9
public static void sort(int[] data, int algorithm) { P8TiB
impl[algorithm-1].sort(data); Qn<<&i~
} 0h; -Yg
Ii"cDH9
public static interface Sort { rbJ-vEzo.#
public void sort(int[] data); ./6L&?*`~;
} aMHIOA%Kh
=}V`O>
public static void swap(int[] data, int i, int j) { eLt6Hg)s`9
int temp = data; 1LE8,Gm&
data = data[j]; H8\N~>
data[j] = temp; hwO]{)%
} }R J2\CP
} GWhb@K