[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; m\/(w_/?
} ZWV|# c<G
int i1=l; mYB`)M*Y
int i2=mid+1; @+U,Nzd
for(int cur=l;cur<=r;cur++){ H(0q6~|
if(i1==mid+1) UkCnqNvx
data[cur]=temp[i2++]; N^VD=<#T
else if(i2>r) /RLq>#:h**
data[cur]=temp[i1++]; `nR%Cav,U
else if(temp[i1] data[cur]=temp[i1++]; CBf7]n0H
else CLKov\U\
data[cur]=temp[i2++]; CGw--`#\
} &@"]+33
} ?B.~AUN
mxSKG> O
} !0/z>#b
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改进后的归并排序: IGX:H)&*
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package org.rut.util.algorithm.support; 8|twV35
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import org.rut.util.algorithm.SortUtil; 2}}?'PwwT
%,b X/!
/** &Y@#g9G
* @author treeroot 3HyhEVR-#~
* @since 2006-2-2 ANH4IYd3
* @version 1.0 :<#`_K~'
*/ E& 36H
public class ImprovedMergeSort implements SortUtil.Sort { 09M;}4ev&7
o7&4G$FX~
private static final int THRESHOLD = 10; BdbJ< Is
FqA3{
/* -U2mfW
* (non-Javadoc) sPNfbCOz
* s_jBu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4aZCFdc
*/ c(-Mc6
public void sort(int[] data) { P2n2Qt2
int[] temp=new int[data.length]; MrE<vw@he
mergeSort(data,temp,0,data.length-1); Ni[4OR$-O
} Oi:JiD=
KiLvI,9y
private void mergeSort(int[] data, int[] temp, int l, int r) { z)F#u:t
int i, j, k; *2u E
int mid = (l + r) / 2; 8dT'xuch
if (l == r) rlok%Rt4Z
return; }\v^+scD
if ((mid - l) >= THRESHOLD) 5IMSNGS
mergeSort(data, temp, l, mid); {g/wY%u=
else hN`gB#N3
insertSort(data, l, mid - l + 1); Pn TZ/|
if ((r - mid) > THRESHOLD) jeN1eM8WI
mergeSort(data, temp, mid + 1, r); B{, Bno
else h"QbA"
insertSort(data, mid + 1, r - mid); c|wCKn}`
EiV=RdL
for (i = l; i <= mid; i++) { j.-VJo)
temp = data; hQh9ok8S
} Z$K+ 7>^
for (j = 1; j <= r - mid; j++) { j~ym<-[{a
temp[r - j + 1] = data[j + mid]; g"t^r3
} !"4w&bQ
int a = temp[l]; snk$^
int b = temp[r]; $CtCOwKZ
for (i = l, j = r, k = l; k <= r; k++) { GCE!$W
if (a < b) { ?)A2Kw>2
data[k] = temp[i++]; 1czG55 |
a = temp; d5xxb _oE
} else { y[HQBv
data[k] = temp[j--]; *)VAaGUX>
b = temp[j]; ;?9A(q_Z
} 7#4%\f+'t
} "!&B4
} 0*(K DDv
q G;-o)h
/** zi!#\s^
* @param data 2o{@nN8%
* @param l %= u/3b:o
* @param i $>vy(Y
*/ m^$5K's&
private void insertSort(int[] data, int start, int len) { qMgfMhQ7DU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^E@@YV
} '_Wt}{h
} #MTj)P,
} 5}<[[}(
} %<U{K;
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堆排序： GEE ]Kr
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package org.rut.util.algorithm.support; >_Uj?F:
k8&FDz
import org.rut.util.algorithm.SortUtil; Fe="EDh
?R?Grw)`H
/** r=csi
* @author treeroot A o3HX
* @since 2006-2-2 i>Iee^_(
* @version 1.0 7Jx%JgF
*/ )*[ ""&
public class HeapSort implements SortUtil.Sort{ AUAI3K?
iPU% /_>
/* (non-Javadoc) }K8Lm-.=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7z<Cu<
*/ QFzFL-H~N
public void sort(int[] data) { Yn1?#%%
MaxHeap h=new MaxHeap(); VN|G5*
h.init(data); Pf8u/?/
for(int i=0;i h.remove(); fNxw&ke8&
System.arraycopy(h.queue,1,data,0,data.length); yisLypM*
} _'c+fG \
%8Yyj{^!(
private static class MaxHeap{ _W9&J&l0so
rbh[j@s@
void init(int[] data){ zUQe0Gc.b^
this.queue=new int[data.length+1]; b7'F|h^
for(int i=0;i queue[++size]=data; <|JU(B
fixUp(size); A70(W{6a9@
} _<u;4RO(s
} >-<F)
Yq0# #__
private int size=0; X8b#[40:
{bTeAfbf]
private int[] queue; $I(}r3r
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public int get() { cj^bh
return queue[1]; FQ##397
} ('HxHOh2
,eK2I Ao
public void remove() { [0op)Kn
SortUtil.swap(queue,1,size--); 7sguGwg)_
fixDown(1); N?^_=KE@
} [|z'"Gk{
file://fixdown ^N{X"
private void fixDown(int k) { \P@S"QO
int j; pE(sV{PD
while ((j = k << 1) <= size) { lbofF==(
if (j < size %26amp;%26amp; queue[j] j++; z`@z
if (queue[k]>queue[j]) file://不用交换 82.HH5Z{
break; gUb "3g0
SortUtil.swap(queue,j,k); w06gY
k = j; #W^_]Q=5R'
} \d5}5J]a&n
} ~,G]glu8
private void fixUp(int k) { ?1$\pq^
while (k > 1) { HSql)iT
int j = k >> 1; &z QWIv
if (queue[j]>queue[k]) l]u7.~b
break; +Z$a1Y@
SortUtil.swap(queue,j,k); 7yUvL8p-
k = j; xZg7Jg
} "MTq{f2?
} C,3T!\
[$oM
} Hi7G/2t@`
d1lH[r!Z
} gQ,4xTX
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SortUtil： =ty2_6&>
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package org.rut.util.algorithm; ;Lqm#]C
I2W{tl
import org.rut.util.algorithm.support.BubbleSort; :^.u-bHI
import org.rut.util.algorithm.support.HeapSort; b8e*Pv/
import org.rut.util.algorithm.support.ImprovedMergeSort; N&,"kRFFo
import org.rut.util.algorithm.support.ImprovedQuickSort; _UaPwJ
import org.rut.util.algorithm.support.InsertSort; XJ _%!
import org.rut.util.algorithm.support.MergeSort; ZgK@Fl*k
import org.rut.util.algorithm.support.QuickSort; tB!|p6
import org.rut.util.algorithm.support.SelectionSort; gvK"*aIj
import org.rut.util.algorithm.support.ShellSort; ^:U;rHY
%WmZ ]@M
/** s1v{~xP
* @author treeroot %27G2^1
* @since 2006-2-2 H'']J9O
* @version 1.0 Mi;Tn;3er
*/ LsnXS9_
public class SortUtil { >7W"giWP
public final static int INSERT = 1; 2t.fD@
public final static int BUBBLE = 2; TiTYs
public final static int SELECTION = 3; 5%#i79z&B
public final static int SHELL = 4; -/1d&
public final static int QUICK = 5; l2r>|CGQ[
public final static int IMPROVED_QUICK = 6; vevx|<9,
public final static int MERGE = 7; r@;$V_I
public final static int IMPROVED_MERGE = 8; '2j~WUEmg
public final static int HEAP = 9; sgR 9d
"hfw9Qm
public static void sort(int[] data) { : qr}M
sort(data, IMPROVED_QUICK); @!Y.935/0
} ?!rU |D
private static String[] name={ z[%[bs2{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :> x:(K
}; ^=3 ^HQ'Zm
}&=uZ:
private static Sort[] impl=new Sort[]{ [CsM<:C
new InsertSort(), 5'),)
new BubbleSort(), p+!f(H
new SelectionSort(), ^1()W,B~w
new ShellSort(), @i\7k(9:A
new QuickSort(), *pY/5? g
new ImprovedQuickSort(), eO~eu]r
new MergeSort(), ,Z >JvTnH
new ImprovedMergeSort(), 5BZ+b_A>VV
new HeapSort() K T%i,T
}; JHHb|
#V,LNX)
public static String toString(int algorithm){ 9{T 8M
return name[algorithm-1]; E`U&Z
} u87=q^$
rGGS]^
public static void sort(int[] data, int algorithm) { uT#Acg
impl[algorithm-1].sort(data); oXvdR(Sb^
} ik8|9m4/
9$n+-GSK
public static interface Sort { 7O]J^H+7
public void sort(int[] data); "Wxo[I
} oA5<[&~<
OA\vT${5
public static void swap(int[] data, int i, int j) { ccIDMJ=2
int temp = data; 6hR^qdHg
data = data[j]; '3IkPy1Uz
data[j] = temp; oD Q9.t
} Zjw!In|vC
} 02;f2;I