[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; x8 _f/2&
} J;|a)Nw
int i1=l; %68'+qz
int i2=mid+1; I() =Ufs5z
for(int cur=l;cur<=r;cur++){ L`NY^
if(i1==mid+1) aS=-9P;v
data[cur]=temp[i2++]; z{`K_s%5
else if(i2>r) . |%n"{
data[cur]=temp[i1++]; HCfme<'
else if(temp[i1] data[cur]=temp[i1++]; %D1 |0v8}
else >~:Md
data[cur]=temp[i2++]; 4Oo{\&(
} z?dd5.k
} fG9 ;7KG
2*Zk^h=
} G%iTL"6
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改进后的归并排序: =gNPS0H
n&OM~Vs
package org.rut.util.algorithm.support; }@x!r=O)I
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import org.rut.util.algorithm.SortUtil; d^MRu#]
'b)qP|
/** _NefzZWUJ
* @author treeroot :aQ.:b(n
* @since 2006-2-2 mC2K &'[
* @version 1.0 ~(nc<M[
*/ =' uePM")
public class ImprovedMergeSort implements SortUtil.Sort { 7-:R{&3Lm:
.V4-
private static final int THRESHOLD = 10; (Zg'])
50_[n$tqE
/* xt_:R~/[
* (non-Javadoc) `+z^#3l
* A]Bf&+V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jvc:)I1NE7
*/ wU6sU]P
public void sort(int[] data) { m<H{@ZgN(
int[] temp=new int[data.length]; n,U?]mr
mergeSort(data,temp,0,data.length-1); Hvb8+"?~
} KpA1Ac)T
pHT]2e#
private void mergeSort(int[] data, int[] temp, int l, int r) { sYjhQN=Y*
int i, j, k; jr,N+K(@T
int mid = (l + r) / 2; jc!m; U t
if (l == r) '2GnAws^
return; nv0\On7wd
if ((mid - l) >= THRESHOLD) /~MH]Gh
mergeSort(data, temp, l, mid); o^XDG^35`
else &rGB58
insertSort(data, l, mid - l + 1); KL9k9|!p
if ((r - mid) > THRESHOLD) fIl;qGz85
mergeSort(data, temp, mid + 1, r); WQ{[q" O
else `78Bv>[A
insertSort(data, mid + 1, r - mid); ~)^'5^
8N%nG( 0
for (i = l; i <= mid; i++) { |BbzRis
temp = data; dvZH~mF
} (:aU"5M
for (j = 1; j <= r - mid; j++) { AtewC Yo
temp[r - j + 1] = data[j + mid]; D|)a7_
} OvAhp&k
int a = temp[l]; +$|fUn{
int b = temp[r]; @/F61Ut
for (i = l, j = r, k = l; k <= r; k++) { K>dB{w#gS
if (a < b) { om`T/@_,
data[k] = temp[i++]; D"rbQXR7$
a = temp; #MKM.T,\t
} else { &\1n=y
data[k] = temp[j--]; Jy5sZ}t[
b = temp[j]; u<Y#J,p`e
} =*&[K^
} "$XX4w M
} sxsb)a
zw['hqW
/** f. "\~
* @param data xNzGp5H
* @param l ];Z6=9n
* @param i kk%32(By
*/ CJ* D
private void insertSort(int[] data, int start, int len) { _Z23lF9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8LbwEKl
} )\|+G5#`
} VGmvfhf#"
} 6|zhqb|s
} 5BJE
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堆排序： )V\@N*L`ik
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package org.rut.util.algorithm.support; 1h&`mqY)L.
IdQ./@?
import org.rut.util.algorithm.SortUtil; X/yq<_ g
&}r"Z?f)
/** fes s6=k
* @author treeroot Ut;`6t
* @since 2006-2-2 Iko]c_W0
* @version 1.0 VG);om7`PD
*/ |5bLV^mv]i
public class HeapSort implements SortUtil.Sort{ N-gYamlQ
u.|Z3=?VG
/* (non-Javadoc) F!]Sr'UA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ot2o=^Ng
*/ } o%^ Mu B
public void sort(int[] data) { Y !?'[t
MaxHeap h=new MaxHeap(); W6&vyOc
h.init(data); _!nsEG VV
for(int i=0;i h.remove(); q`VL i
System.arraycopy(h.queue,1,data,0,data.length); WwDM^}e
} 3 r&
&EfQ%r}C
private static class MaxHeap{ l~6K}g?
%GHGd'KO&
void init(int[] data){ T#))_aC
this.queue=new int[data.length+1]; wY8:j
for(int i=0;i queue[++size]=data; {_QdB;VwH
fixUp(size); f8Iddm#
} p+CUYo(
} iRzFA!wH
p49]{2GXb
private int size=0; =V[uXm
~SnUnNDm`
private int[] queue; Jsz!ro
n t}7|h|
public int get() { p;O%W@n"
return queue[1]; 5% 2A[B
} Ao\xse{E
"8xAe0-4
public void remove() { kAki9a(=!
SortUtil.swap(queue,1,size--); D|N4X`T`
fixDown(1); .Q{RTp
} SIe!=F[
file://fixdown an"&'D}U
private void fixDown(int k) { *MP.YI:h
int j; :?>7Z6
while ((j = k << 1) <= size) { CD$#}Id
if (j < size %26amp;%26amp; queue[j] j++; 'X^auyL
if (queue[k]>queue[j]) file://不用交换 Y`;}w}EcgR
break; F5h/>
SortUtil.swap(queue,j,k); FSIiw#xzH
k = j; 5(3O/C{?~
} "& ,ov#
} fw%`[(hK
private void fixUp(int k) { CSO'``16
while (k > 1) { &{}Mds
int j = k >> 1; jJy:/!i
if (queue[j]>queue[k]) EB~]6.1
break; ?sf<cFF
SortUtil.swap(queue,j,k); 1E+12{~m"i
k = j; F (*B1J2_g
} gcJ!_KZK
} $[ {5+*
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} mdj%zJ8/
`o[l%I\Q
} JVZ-nHf(9
{.p.?
SortUtil： /jY u-H+C
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package org.rut.util.algorithm; a.Ho>(V/4
^*K=wE}AG
import org.rut.util.algorithm.support.BubbleSort; r|Ui1f5
import org.rut.util.algorithm.support.HeapSort; (}: s[cs
import org.rut.util.algorithm.support.ImprovedMergeSort; P@{x@9kI
import org.rut.util.algorithm.support.ImprovedQuickSort; UUah5$Iy
import org.rut.util.algorithm.support.InsertSort; i0vm00oT
import org.rut.util.algorithm.support.MergeSort; ag-A}k>v
import org.rut.util.algorithm.support.QuickSort; X8nos
import org.rut.util.algorithm.support.SelectionSort; o NtFYY
import org.rut.util.algorithm.support.ShellSort; : T*Q2
#9vC]Gm
/** Shm> r@C?
* @author treeroot /^.|m3
* @since 2006-2-2 KZm&sk=QM-
* @version 1.0 aurs~
*/ 2u"lc'9v
public class SortUtil { 1F@k9[d~
public final static int INSERT = 1; =BJe)!b
public final static int BUBBLE = 2; <W4F`6`x
public final static int SELECTION = 3; $v^hzC
public final static int SHELL = 4; -@orIwA&
public final static int QUICK = 5; hAGHb+:
public final static int IMPROVED_QUICK = 6; YH&=cI@
public final static int MERGE = 7; JJ?{V:
public final static int IMPROVED_MERGE = 8; Ei;tfB
public final static int HEAP = 9; 2hh8G5IaQ
iOE. .xA:
public static void sort(int[] data) { K7 e~%mY
sort(data, IMPROVED_QUICK); [a=exK
} iI3:<j l
private static String[] name={ i+_LKHQN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SQKhht`M
}; Q;M\fBQO}&
?,} u6tH
private static Sort[] impl=new Sort[]{ $3-vW{<
new InsertSort(), ^h(wi`i
new BubbleSort(), zLI0RI.Pe
new SelectionSort(), }z3j7I
new ShellSort(), g'0CYY
new QuickSort(), aeqz~z2~8s
new ImprovedQuickSort(), VYvfx
new MergeSort(), K_7pr~D]@r
new ImprovedMergeSort(), 3EoCEPb#
new HeapSort() NvR{S /Z
}; 1b,a3w(:1
Cux(v8=n
public static String toString(int algorithm){ 8{ zX=
return name[algorithm-1]; `Q]N]mK
} &Y@i:O
}X(&QZ7i`
public static void sort(int[] data, int algorithm) { +mQ5\14#
impl[algorithm-1].sort(data); =L6#=7hcl
} Gp"GTPT{
rzjVUPdnh
public static interface Sort { c_lHj#A(l
public void sort(int[] data); )>volP
} lj4Fg*/Yn
Zt=|q$"
public static void swap(int[] data, int i, int j) { 5]xuU.w'
int temp = data; )uPJ? 2S9
data = data[j]; S-Uod y
data[j] = temp; @"@a70WHk
} .3!Wr*o
} 9shfy4?k