[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; b<5:7C9z
} mLq?-&F
int i1=l; (1jkZ^7
int i2=mid+1; O^:Pr8|{J
for(int cur=l;cur<=r;cur++){ Y_)04dmr@[
if(i1==mid+1) <:&w/NjbI
data[cur]=temp[i2++]; mZM5aTQ3
else if(i2>r) Vq<|DM3z<
data[cur]=temp[i1++]; 9d2$F9]:o
else if(temp[i1] data[cur]=temp[i1++]; ORHC bw9
else d!wd,Xj}
data[cur]=temp[i2++]; m]DjIs*@%h
} Rwy:.)7B$q
} HE(U0<9c
CWDo_g$
} %5z88-\
>eRbasshEI
改进后的归并排序: %pg*oX1VK6
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package org.rut.util.algorithm.support; ~RMOEH.o
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import org.rut.util.algorithm.SortUtil; \h0e09& I
A6UtpyS*'
/** )?TJ{'m
* @author treeroot 7NXT.E~2
* @since 2006-2-2 GzR;`,_O/
* @version 1.0 ]\3dJ^q|%
*/ iySmNI
public class ImprovedMergeSort implements SortUtil.Sort { zzW^AvR
#Ta@A~.L
private static final int THRESHOLD = 10; d+^4;Hv4
*aT!|;
/* `\.n_nM
* (non-Javadoc) wvh4AE5F|z
* &<>A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^~Ar
*/ !*\^-uvaK
public void sort(int[] data) { t(_XB|AKm
int[] temp=new int[data.length]; "thu@~aC
mergeSort(data,temp,0,data.length-1); /aPq9B@
} z&t6,0q`5
.g|pgFM?
private void mergeSort(int[] data, int[] temp, int l, int r) { om/gk4S2
int i, j, k; $8eq&_gJ
int mid = (l + r) / 2; p,1RRbyc
if (l == r) GdP9Uj)n-
return; tr'95'5W.
if ((mid - l) >= THRESHOLD) mC93 &0
mergeSort(data, temp, l, mid); Q;^([39DI
else h\ybh
insertSort(data, l, mid - l + 1); z1:auodI@
if ((r - mid) > THRESHOLD) ( Rf)&KN
mergeSort(data, temp, mid + 1, r); %%3ugD5i!
else Em?skUnG,
insertSort(data, mid + 1, r - mid); /JfXK$`
k1cBMDSokO
for (i = l; i <= mid; i++) { #/1Bam6
temp = data; [ z&y]~
} }0!\%7-Q
for (j = 1; j <= r - mid; j++) { 8t7hN?,t
temp[r - j + 1] = data[j + mid]; AV&ege
} =AAH}
int a = temp[l]; nv8,O=#s
int b = temp[r]; +,KuYa{lu
for (i = l, j = r, k = l; k <= r; k++) { +X- k)9
if (a < b) { ![V<vIy
data[k] = temp[i++]; J{1O\i
a = temp; {6AJ>}3
} else { +?L~fM69B
data[k] = temp[j--]; K:{Q~+
b = temp[j]; ]pGr'T~Gj
} n/8fv~zU
} AKWw36lm
} hQ\]vp7V
/2U.,vw
/** !eO?75/
* @param data m$cM+
* @param l }@#eD
* @param i dy0!Zz
*/ 0b|!S/*A3
private void insertSort(int[] data, int start, int len) { O4#zsr:"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5QT9
} 8~I>t9Q+
} -`gC?yff:
} KA<
} nDo|^{!L`
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堆排序： 4 IHl'*D[#
Z*Y?"1ar
package org.rut.util.algorithm.support; pp-Ur?PM
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import org.rut.util.algorithm.SortUtil; IrVeP&KM+
!bY{T#i)k
/** 7oWv'
* @author treeroot H>D_0o<#y
* @since 2006-2-2 H9nq.<;p
* @version 1.0 VT9$&\)>O
*/ ULJI`I|m
public class HeapSort implements SortUtil.Sort{ xpnnWHdaq
HWd,1
/* (non-Javadoc) )I<.DN&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ox*Ka]
*/ |~/{lE=I
public void sort(int[] data) { 6`s[PKP.
MaxHeap h=new MaxHeap(); k^L (q\D
h.init(data); jC@^/rMh
for(int i=0;i h.remove(); l)|CPSN?w
System.arraycopy(h.queue,1,data,0,data.length); vB,N6~r>
} vxm`[s|QC
Du{]r[[C
private static class MaxHeap{ N;w1f"V}
8sIGJ|ku
void init(int[] data){ PM|K*,3J
this.queue=new int[data.length+1]; aR\=p:%jGI
for(int i=0;i queue[++size]=data; ;js7rt
fixUp(size); }6KL
} JDs<1@\
} Fivv#4YO
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private int size=0; g5"g,SFGr
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private int[] queue; dYsqF 3f
\i&yR]LF
public int get() { yJrPb"
return queue[1]; $W2g2[+
} JrQN-e!
s)N1@RBR
public void remove() { e^FS/=
SortUtil.swap(queue,1,size--); x}roPhZ
fixDown(1); E*ic9Za8`h
} bZi>
file://fixdown tQ/w\6{
private void fixDown(int k) { Uarb [4OZ
int j; WFB2Ub7
while ((j = k << 1) <= size) { x88$#N>Q5
if (j < size %26amp;%26amp; queue[j] j++; l|&nGCW
if (queue[k]>queue[j]) file://不用交换 z(]*'0)P
break; %1 v)rg y
SortUtil.swap(queue,j,k); N7E[wOP
k = j; @M,_mX
} 87HVD Di
} 15zL,yo
private void fixUp(int k) { !At_^hSqz
while (k > 1) { o#T,vu0s
int j = k >> 1; |9%>R*
if (queue[j]>queue[k]) "[8](3\v
break; ~/NA?E-c
SortUtil.swap(queue,j,k); zso.?`85
k = j; YgDgd\
} LJiMtqg
} D( _aXy
"qF&%&#r'
} ^fx9R5E$:
E`X+fJx
} EfyF]cYL
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SortUtil： /0r2v/0
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package org.rut.util.algorithm; Q~]R#S
9xSAWKr,l
import org.rut.util.algorithm.support.BubbleSort; 5~sJ$5<,
import org.rut.util.algorithm.support.HeapSort; 'UB<;6wy
import org.rut.util.algorithm.support.ImprovedMergeSort; a@ lK+t
import org.rut.util.algorithm.support.ImprovedQuickSort; w3& F e=c
import org.rut.util.algorithm.support.InsertSort; c_".+Fa
import org.rut.util.algorithm.support.MergeSort; $$8"i+,K
import org.rut.util.algorithm.support.QuickSort; 9LFg":
import org.rut.util.algorithm.support.SelectionSort; !qcR5yk`2
import org.rut.util.algorithm.support.ShellSort; 7' 6m;b~F
Yd,*LYd2EL
/** u'N'<(\k
* @author treeroot 9 ROKueP
* @since 2006-2-2 ~MXPiZG?
* @version 1.0 H7{ 6t(0j
*/ 3v{GP>
public class SortUtil { n,0}K+}
public final static int INSERT = 1; 0zEn`rq&
public final static int BUBBLE = 2; ou(9Qf zN
public final static int SELECTION = 3; R~tv?hP
public final static int SHELL = 4; UyJ5}fBJ
public final static int QUICK = 5; jR48.W
public final static int IMPROVED_QUICK = 6; _2TIan}
public final static int MERGE = 7; eag$i.^aS
public final static int IMPROVED_MERGE = 8; 8n'C@#{WV
public final static int HEAP = 9; @z2RMEC~
+/Z:L$C6
public static void sort(int[] data) { Q0r_+0[7j
sort(data, IMPROVED_QUICK); <}UqtDF 0
} 8en85 pp8P
private static String[] name={ b'ew Od=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :H?p^d e
}; p?!]sO1l
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private static Sort[] impl=new Sort[]{ *m|]c4
new InsertSort(), ad"&c*m[
new BubbleSort(), *+J&ebSTN
new SelectionSort(), ypml22)kz
new ShellSort(), v&?Bqj
new QuickSort(), JL*-L*|Zcl
new ImprovedQuickSort(), 9@S icqx
new MergeSort(), oACE:h9U
new ImprovedMergeSort(), <H 3}N!
new HeapSort() un\"1RdO
}; \Q3m?)X=Gd
ir\
public static String toString(int algorithm){ %;zA_Wg
return name[algorithm-1]; .t["kaA
} Gd'^vqo<
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public static void sort(int[] data, int algorithm) { '[A>eC++
impl[algorithm-1].sort(data); mB!81%f%|
} Pajr`gU
#cApk
public static interface Sort { *{tJ3<t(1
public void sort(int[] data); ha(hG3C
} HFf| >&c&
m=n V$H
public static void swap(int[] data, int i, int j) { 1dKLNE
int temp = data; 7g=Ze~aq
data = data[j]; ZLO_5#<
data[j] = temp; G&;W
} Y@pa+~[{h3
} paF2{C)4