[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; ]imVIu
} (?g+.]Dt,
int i1=l; 4x<H=CJC
int i2=mid+1; $)nPj_h
for(int cur=l;cur<=r;cur++){ +V(^"Z~
if(i1==mid+1) V7}'g6X
data[cur]=temp[i2++]; T`MM<+^G
else if(i2>r) *p=enflU
data[cur]=temp[i1++]; E=CAWj\
else if(temp[i1] data[cur]=temp[i1++]; MkHkM
else Q@W!6]*\
data[cur]=temp[i2++]; =)G]\W)m
} Caz5q|Oo
} d#XgO5eyO
<.Pt%Kg^BS
} (7N!Jvg9
i=*H|)
改进后的归并排序: 7_P33l8y
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package org.rut.util.algorithm.support; 1Jdx#K
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import org.rut.util.algorithm.SortUtil; U?d I
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/** P(FlU]q
* @author treeroot 5|~nX8>
* @since 2006-2-2 |x.^rx`
* @version 1.0 Mtv{37k~
*/ H3*]}=
public class ImprovedMergeSort implements SortUtil.Sort { }!{R;,5/n
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private static final int THRESHOLD = 10; $U.|
w;{Q)_A
/* + kT ]qH
* (non-Javadoc) pdR\Ne0P*
* @87Y/_l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W!R0:-
*/ .>#O'Z&q9
public void sort(int[] data) { UGd\`*Cj
int[] temp=new int[data.length]; 4`)r1D!U
mergeSort(data,temp,0,data.length-1); &tvtL
} Ww60-d}}Q
gKl9Nkd!R
private void mergeSort(int[] data, int[] temp, int l, int r) { PVH Or^
int i, j, k; ^"p. 3Hy
int mid = (l + r) / 2; n?$c"}
if (l == r) =Gu&0f
return; u8.Tu7~
if ((mid - l) >= THRESHOLD) #;~HoOK*#
mergeSort(data, temp, l, mid); dt@c,McN|Q
else XVqkw@Ia4!
insertSort(data, l, mid - l + 1); @8>bp#x/1
if ((r - mid) > THRESHOLD) _k26(rdI@-
mergeSort(data, temp, mid + 1, r); 9PA<g3z
else akNqSZwj
insertSort(data, mid + 1, r - mid); r180vbN$
L%(NXSfu7
for (i = l; i <= mid; i++) { Pzq^x]
temp = data; nIr`T^c9c
} j`"!G*Vh
for (j = 1; j <= r - mid; j++) { #) :.1Z?
temp[r - j + 1] = data[j + mid]; %cg| KB"l
} .{c7 I!8
int a = temp[l]; 1++g@8
int b = temp[r]; vG'#5%,|
for (i = l, j = r, k = l; k <= r; k++) { "^6Fh"]
if (a < b) { jd-ccnR l
data[k] = temp[i++]; o+}k$i!6
a = temp; KUYwc@si\
} else { =f y|Dm74
data[k] = temp[j--]; ` 6*]cn#(
b = temp[j]; lH`TF_
} HUD0 @HQI
} J<+f7L
} =?0v,;F9|
!L9OJ1F
/** s5{=lP
* @param data {pH#zs4Y
* @param l cQuL9Xo
* @param i ~WTkX(\
*/ ssx#|InY
private void insertSort(int[] data, int start, int len) { B7[d^Y60B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &nXE?-J
} 5N$XY@
} aIFlNS,y
} 5v)bs\x6
} o ?vGI=
Ms,MXJtH
堆排序： dt:$:,"
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package org.rut.util.algorithm.support; r9&m^,U
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import org.rut.util.algorithm.SortUtil; x1#>"z7
Nz.X$zUmY
/** Rr%x;-
* @author treeroot m!Z<\2OP
* @since 2006-2-2 O 1z0dHa
* @version 1.0 =xIZJ8e
*/ z/xPI)R[
public class HeapSort implements SortUtil.Sort{ p>+9pxx~U
xmcZN3 ){+
/* (non-Javadoc) -grf7w^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y2QX<
*/ g assOd
public void sort(int[] data) { b{ xlW }S
MaxHeap h=new MaxHeap(); s+lBai*#
h.init(data); ebI2gEu;a
for(int i=0;i h.remove(); >*h+N? m
System.arraycopy(h.queue,1,data,0,data.length); ').)0;
} Rv9jLH
Zf@B< m
private static class MaxHeap{ 30uPDDvar
3._ ep
void init(int[] data){ 6 Ln~b<I
this.queue=new int[data.length+1]; N$]er'`
for(int i=0;i queue[++size]=data; \\<=J[R.M
fixUp(size); sd\p[MXX
} q/U-6A[0
} Pn OWQ8=
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private int size=0; {owuYVm
( ~5M{Xh
private int[] queue; r)'vn[A
\OVtvJV]
public int get() { `R8&(kQ
return queue[1]; IB[$~sGe
} Pn">fWRCx
]qv0Y~+`-K
public void remove() { Yu3S3aRE
SortUtil.swap(queue,1,size--); g) u%?T
fixDown(1); xz"60xxY
} ~SQxFAto
file://fixdown :Fb>=e
private void fixDown(int k) { ]q%r2 (y,k
int j; U*$P"sS`
while ((j = k << 1) <= size) { xrg?{*\
if (j < size %26amp;%26amp; queue[j] j++; Y)X7*iTi'j
if (queue[k]>queue[j]) file://不用交换 >Dr(%z6CN
break; B{j><uxl
SortUtil.swap(queue,j,k); X"r)zCP+t
k = j; EYq?NL='
} [UzD3VPg
} (4R(5t
private void fixUp(int k) { =9a2+v0
while (k > 1) { A%.mIc.
int j = k >> 1; l}z<q
if (queue[j]>queue[k]) TR0y4u[
break; 8J(j}</>a
SortUtil.swap(queue,j,k); XJ4f;U
k = j; NVv <vu
} T(7`$<TQ
} 29RP$$gR
xGwImF$r
} ;3cbXc@]
#_ |B6!D!
} $5&%X'jk
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SortUtil： JkAM:,^(
sg $db62>
package org.rut.util.algorithm; INi$-Y+
lln"c
import org.rut.util.algorithm.support.BubbleSort; z5fE<=<X_W
import org.rut.util.algorithm.support.HeapSort; njy2pDC@
import org.rut.util.algorithm.support.ImprovedMergeSort; rY_~(?XS
import org.rut.util.algorithm.support.ImprovedQuickSort; /YvXyi>^"%
import org.rut.util.algorithm.support.InsertSort; Z;.-UXat
import org.rut.util.algorithm.support.MergeSort; X=$Jp.
import org.rut.util.algorithm.support.QuickSort; _AX9Mu]
import org.rut.util.algorithm.support.SelectionSort; (G"'Fb6d
import org.rut.util.algorithm.support.ShellSort; :x\[aG9
K.)!qkW-%S
/** >S +}
* @author treeroot r.H`3m.0q
* @since 2006-2-2 P9cx&Hk9
* @version 1.0 2^WJ1: A
*/ l/X_CM8y~
public class SortUtil { l'+3 6
public final static int INSERT = 1; S:_Ms{S
public final static int BUBBLE = 2; YO7U}6wBt
public final static int SELECTION = 3; EJkHPn
public final static int SHELL = 4; ;?2)[a
public final static int QUICK = 5; hC:'L9Y
public final static int IMPROVED_QUICK = 6; p`Pa;=L
public final static int MERGE = 7; ~$HB}/
public final static int IMPROVED_MERGE = 8; O^@8Drgc
public final static int HEAP = 9; x4'@U<
IK2da@V
public static void sort(int[] data) { 2a$.S" ?
sort(data, IMPROVED_QUICK); g<:Lcg"u
} C& +MRP
private static String[] name={ 7=l~fKu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @k?vbq
}; OpUfK4U)
?,vLRq.
private static Sort[] impl=new Sort[]{ n1f8jS+'}
new InsertSort(), ]" 'yf;g
new BubbleSort(), @Po5AK3cy
new SelectionSort(), iE~!?N|a3
new ShellSort(), g&Vhu8kNIA
new QuickSort(), }Ce9R2
new ImprovedQuickSort(), 7OV^>"S
new MergeSort(), YJJ1N/Z1
new ImprovedMergeSort(), fq7#rZCxX
new HeapSort() "Oxr}^% i
}; hLO)-ueb
yE$PLM
public static String toString(int algorithm){ R}&?9tVRR
return name[algorithm-1]; w$}q`k'
} Dp'urf\*$
oB:7R^a
public static void sort(int[] data, int algorithm) { @Kpm&vd(
impl[algorithm-1].sort(data); FOTe,F.8
} CsO!Y\'FY
7H6Ts8^S
public static interface Sort { ewMVUq*:
public void sort(int[] data); e=sc$1|4=
} Ni_H1G
jl,gqMn"V
public static void swap(int[] data, int i, int j) { p_gN}v
int temp = data; b;i*}4h!
data = data[j]; L AQ@y-K3
data[j] = temp; MP%#)O6
} xWLvx'8W
} -KiPqE%&G