[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; $@~sO0q
} cEGR?4z
int i1=l; B3E}fQm )
int i2=mid+1; #d$lN}8
for(int cur=l;cur<=r;cur++){ p uW
if(i1==mid+1) 7LiyA<
data[cur]=temp[i2++]; SgQ(#y|vV
else if(i2>r) H@sM$8
data[cur]=temp[i1++]; ,2mq}u>WU
else if(temp[i1] data[cur]=temp[i1++]; z -'e<v;w
else D_BdvWSxj
data[cur]=temp[i2++]; |)[&V3+|
} )k81
} KBgFS%-W
u&e?3qKX(
} -(zw80@&
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改进后的归并排序: "71Y{WQ
-=qHwcId
package org.rut.util.algorithm.support; }-p-(
)Dyyb1\)
import org.rut.util.algorithm.SortUtil; J$S*QCo
UK.=Y9
/** Sb`SJ):x
* @author treeroot >P-'C^:V=
* @since 2006-2-2 0SJ(Ln`0K
* @version 1.0 z\Z+>A
*/ 0bjZwC4J
public class ImprovedMergeSort implements SortUtil.Sort { >bg{
"|/q4JN)7d
private static final int THRESHOLD = 10; @`aPr26>?
1czU$!MV
/* #,OiZQJC
* (non-Javadoc) jK2gc^"t
* 2]H?q!l!O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rd|^C$6
*/ 0kaMYV?
public void sort(int[] data) { |lh&l<=(f
int[] temp=new int[data.length]; M+7jJ?n
mergeSort(data,temp,0,data.length-1); ngzQVaB9
} $^W|@et{ ]
TIno"tc3
private void mergeSort(int[] data, int[] temp, int l, int r) { 3H%bbFy
int i, j, k; R%Xz3Z&|
int mid = (l + r) / 2; f5'vjWJ30
if (l == r) ,?!MVN-
return; Z;6?,5OSc
if ((mid - l) >= THRESHOLD) 1z@{4)
mergeSort(data, temp, l, mid); BuS[(
else Nk?/vMaw
insertSort(data, l, mid - l + 1); s2 $w>L
if ((r - mid) > THRESHOLD) ![m6$G{y
mergeSort(data, temp, mid + 1, r); aF.fd2k
else e)|5P
insertSort(data, mid + 1, r - mid); M?I^`6IOc8
r^,"OM]
for (i = l; i <= mid; i++) { gVs@T'
temp = data; P@U2Q%\
} ex|h&Vma2V
for (j = 1; j <= r - mid; j++) { Y\E7nll:.
temp[r - j + 1] = data[j + mid]; l2kUa'O-
} }zrapL"9X
int a = temp[l]; ubl)$jZ:Q
int b = temp[r]; UFyk%#L
for (i = l, j = r, k = l; k <= r; k++) { c=p!2jJ1K~
if (a < b) { %ejq|i7
data[k] = temp[i++]; _BG7JvI
a = temp; Jl ?_GX}ZY
} else { L!~ap
data[k] = temp[j--]; {}BAQ9|q
b = temp[j]; yER
} E|_}?>{R
} eCG{KCM~_Z
} (dHjf;
>txeo17Ba\
/** X5=I{eY}
* @param data fPG3$<Zr
* @param l -a7BVEFts
* @param i 5X:3'*
*/ rW`l1yi*$
private void insertSort(int[] data, int start, int len) { 2fP;>0?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .d+zF,02Z
} .>Fpk7
} @IOl0db
} ;&MnPFmq
} -:Bgp*S
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堆排序： #{J+BWP\o
'a>D+A:
package org.rut.util.algorithm.support; c-4z8T#M^
q XB E3
import org.rut.util.algorithm.SortUtil; kR{$&cE^
So4#n7
/** `)Y 5L}c=
* @author treeroot Ti>}To}B5
* @since 2006-2-2 :c(#03w*C
* @version 1.0 :0Fc E,1
*/ XY<KLO%
public class HeapSort implements SortUtil.Sort{ u/FC\xJc
l|M|;5TW
/* (non-Javadoc) 'h[7AZ&)#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $_gv(&ZT
*/ n2Q?sV;m
public void sort(int[] data) { i*mI-l
MaxHeap h=new MaxHeap(); \jAI~|3
h.init(data); ,_K:DSiB
for(int i=0;i h.remove(); +^*b]"[
System.arraycopy(h.queue,1,data,0,data.length); Fzz9BEw(i
} V@K^9R,|
Y]i:$X]C?X
private static class MaxHeap{ qJR8fQ
kH=qJ3Z
void init(int[] data){ .ZM0cwF
this.queue=new int[data.length+1]; ?"@SxM~\
for(int i=0;i queue[++size]=data; FA;B:O@:'
fixUp(size); H7f Xg
} AOx8OiqE:
} !. :b}t
${`q!
private int size=0; o%K1!'
pE$*[IvQ'
private int[] queue; y8]vl;88yY
CS0q#?
public int get() { 5'_:>0}
return queue[1]; ML%JTx0+Z
} 0UQ DB5u
m`jGBSlw_
public void remove() { l I2UpfkBP
SortUtil.swap(queue,1,size--); l>)+HoD
fixDown(1); %m$t'?
} 2 S2;LB
file://fixdown |WW'qg]Uu
private void fixDown(int k) { OOYdrv,
int j; Vc+~yh.)
while ((j = k << 1) <= size) { ;}k_
if (j < size %26amp;%26amp; queue[j] j++; T;i+az{N:V
if (queue[k]>queue[j]) file://不用交换 ?XVox*6K&
break; m3|l-[!OA"
SortUtil.swap(queue,j,k); =UxKa`
k = j; zoj w^%W
} ZT+{8,
} 8an_s%,AW
private void fixUp(int k) { DXK\3vf Ot
while (k > 1) { \p)eY#A
int j = k >> 1; h{ eQ\iI
if (queue[j]>queue[k]) 8'u,}b)
break; w7~&Xxa/
SortUtil.swap(queue,j,k); _HkQv6fXpE
k = j; F0'8n6zj
} lT'V=,Y t
} f1U:_V^d
=-G4BQ
} xww\L &y
OGW0lnQ/
} u2*."W\
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SortUtil： l!IN#|{(
Ub[UB%(T
package org.rut.util.algorithm; OO;I^`Yn
|2I p*
import org.rut.util.algorithm.support.BubbleSort; 4hUUQ;xj
import org.rut.util.algorithm.support.HeapSort; }mS+%w"j
import org.rut.util.algorithm.support.ImprovedMergeSort; (R!.=95@
import org.rut.util.algorithm.support.ImprovedQuickSort; )F6p+i="
import org.rut.util.algorithm.support.InsertSort; C6d#+
import org.rut.util.algorithm.support.MergeSort; ZV[-$
import org.rut.util.algorithm.support.QuickSort; r1sA^2g.
import org.rut.util.algorithm.support.SelectionSort; t_qX7P8+'
import org.rut.util.algorithm.support.ShellSort; ##U/Wa3
h\8bo=
/** j)}TZx4~
* @author treeroot r6kQMFA
* @since 2006-2-2 N Q}5'
* @version 1.0 DMT2~mh
*/ 5gwEr170
public class SortUtil { ) 3I|6iS
public final static int INSERT = 1; YV6w}b:
public final static int BUBBLE = 2; kb'l@d#E
public final static int SELECTION = 3; D \boF+^
public final static int SHELL = 4; dkZ[~hEQG-
public final static int QUICK = 5; UDb
public final static int IMPROVED_QUICK = 6; V}Pv}j:;
public final static int MERGE = 7; Rz33_ qA
public final static int IMPROVED_MERGE = 8; Fh.ZsPn,m
public final static int HEAP = 9; `>`{DEDx{5
EHt(!;?q
public static void sort(int[] data) { &y~GTEP
sort(data, IMPROVED_QUICK); S|_lbMZM
} #twl
private static String[] name={ |tO.@+[uqP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7gt%[r M
}; $oZV 54
gn[h:+H&
private static Sort[] impl=new Sort[]{ N0fmC*1-
new InsertSort(), >n>gX/S<C
new BubbleSort(), 6!RKZj)
new SelectionSort(), 8HdjZ!
new ShellSort(), ,m)YL>k
new QuickSort(), ~uJO6C6A
new ImprovedQuickSort(), i\\,Z L
new MergeSort(), MUp{2_RA
new ImprovedMergeSort(), iRL|u~bj
new HeapSort() -yY]0
}; ?gS~9jgcd
u~27\oj,
public static String toString(int algorithm){ ~<=wTns!
return name[algorithm-1]; 8uB6C0,6?
} , ins/-3
h8HA^><Xr
public static void sort(int[] data, int algorithm) { z4(Q.0x7
impl[algorithm-1].sort(data); )(`,!s,8)
} T2k# "zD
w5mSoKb
public static interface Sort { ( z.\,M
public void sort(int[] data); &P>a
} R?l={N=Wf
YuzgR;Z
public static void swap(int[] data, int i, int j) { $9<P3J 1
int temp = data; y?V#LW[^E
data = data[j]; RZI4N4o
data[j] = temp; u]t#Vf-$u
} o&rNM5:
} )n$RHt+:>