[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; V%8(zt
} \W*L9azr
int i1=l; A*OqUq/H`;
int i2=mid+1; _WEJ,0*#'
for(int cur=l;cur<=r;cur++){ Vm%G q
if(i1==mid+1) =z'(FP5!0
data[cur]=temp[i2++]; k6bct@7
else if(i2>r) |3]/CrR_
data[cur]=temp[i1++]; F vkyp"W3
else if(temp[i1] data[cur]=temp[i1++]; b G:\*1T
else Blxa0&3
data[cur]=temp[i2++]; qX@e+&4P0
} QY;(Ny/(y
} cUR :a@
?#z$(upQ
} *V2;ds.~
aj5HtP-
改进后的归并排序: JQ%hh&M\0
W![K#r5T
package org.rut.util.algorithm.support; Hhknjx
t.( `$
import org.rut.util.algorithm.SortUtil; Rt#QW*h\|i
LSC[S:
/** t;o\"H
* @author treeroot nCq'=L,m
* @since 2006-2-2 95,]86
* @version 1.0 ^77W#{Zs
*/ DsMo_m/"1
public class ImprovedMergeSort implements SortUtil.Sort { [BE_^d5&
uMQI Aapb
private static final int THRESHOLD = 10; 3'z$@;Ev+
MqZ"Js
/* ~0p8joOH
* (non-Javadoc) vqeH<$WHvy
* !,`'VQw$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hju^x8 ,=m
*/ U"r*kO%
public void sort(int[] data) { d'';0[W)
int[] temp=new int[data.length]; 9Vt ^q%DC
mergeSort(data,temp,0,data.length-1); 3RtVFDIZA"
} Xe_ <]|
5=?P6I_$G
private void mergeSort(int[] data, int[] temp, int l, int r) { }h^ fX
int i, j, k; A]bQUWt2
int mid = (l + r) / 2; "B3jq^
if (l == r) Jt[ug26
return; sx#O3*'>1
if ((mid - l) >= THRESHOLD) 1X)#iY
mergeSort(data, temp, l, mid); N?qETp-:
else 7z;2J;u`n
insertSort(data, l, mid - l + 1); NZ1B#PG,c
if ((r - mid) > THRESHOLD) ZN}`A7
mergeSort(data, temp, mid + 1, r); b\"F6TF:
else (u 7Lh>6%
insertSort(data, mid + 1, r - mid); L/u|90)L
dUv@u!}B
for (i = l; i <= mid; i++) { O&7.Ry m
temp = data; $]|3^(y``
} Dl/ C?Fll
for (j = 1; j <= r - mid; j++) { |.c4y*
temp[r - j + 1] = data[j + mid]; UCVYO. 9"
} p6j-8ggL
int a = temp[l]; A-r;5?S
int b = temp[r]; Ar>B_*dr
for (i = l, j = r, k = l; k <= r; k++) { 9?\cm}^?
if (a < b) { k1z`92"
data[k] = temp[i++]; r-T1^u
a = temp; 4 ?BQ&d
} else { g"/n95k<
data[k] = temp[j--]; E{V?[HcWq
b = temp[j]; z- q.8~Z
} 3Ws(],Q
} V=ll 9M
} }Q`+hJ0
o`CM15d*7o
/** (3N/DY1/
* @param data ZRjM^ d;
* @param l Q9cSrU[$
* @param i "w"a0nv
*/ $'\kK,=
private void insertSort(int[] data, int start, int len) { q;9X8 _
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QDxs+<#
} G+=Gc(J
} ;SXkPs3q
} 2(d
} T}!9T!(HdF
L!JC)p.
堆排序： `RY}g;
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package org.rut.util.algorithm.support; ]ttF''lH
#btz94/~O
import org.rut.util.algorithm.SortUtil; |4DN2P
B6F!"
/** l'l&Zqd
* @author treeroot 46vC/
* @since 2006-2-2 B\ 'rxbH
* @version 1.0 d\qszYP[
*/ ;X+0,K3c
public class HeapSort implements SortUtil.Sort{ ;^:8F
GpPM?
/* (non-Javadoc) i@:^b_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5%D`y|
*/ 3z0Bg
public void sort(int[] data) { \:h7,[e
MaxHeap h=new MaxHeap(); dkg`T#}
h.init(data); h HHR]e5:
for(int i=0;i h.remove(); f/L8usBXq
System.arraycopy(h.queue,1,data,0,data.length); 0VvY(j:hp
} P_b5`e0O
D*@'%<?
private static class MaxHeap{ zji9\
Hva!6vwO%O
void init(int[] data){ Zs^zD;zU
this.queue=new int[data.length+1]; UK OhsE
for(int i=0;i queue[++size]=data; * 0K]/tn<
fixUp(size); 1]>JMh%X9t
} h<3bv&oI .
} trwo(p
VXCB.C"
private int size=0; V@+sNM
H`<u2fo|p
private int[] queue; idBdaZg
G>^= Bm_$
public int get() { &K!0yR
return queue[1]; lYe2;bu
} bLl ?!G.
\aSc2Ml]3n
public void remove() { <Y /3U
SortUtil.swap(queue,1,size--); =l2 @'YQ
fixDown(1); )%/ Ni^
} %D-!<)z
file://fixdown E>@]"O)=M,
private void fixDown(int k) { '3^_:E5y
int j; $lB!Q8a$
while ((j = k << 1) <= size) { "/O07l1Q<
if (j < size %26amp;%26amp; queue[j] j++; #U'}g *
if (queue[k]>queue[j]) file://不用交换 rG-x 3>b
break; (|O(BxS
SortUtil.swap(queue,j,k); !]"M]tyv\
k = j; :V"e+I
} W SvhC
} c9gm%
private void fixUp(int k) { @6_w{6:b
while (k > 1) { 6I~M8Lo;
int j = k >> 1; uYFy4E3
if (queue[j]>queue[k]) 5 3+C;]J
break; XwIHIG}
SortUtil.swap(queue,j,k); \xOYa
k = j; S41S+#7t*
} 5:+x7Ed
} \Ogs]4
1Xcj=I-4
} c~M'O26bW
P2>_qyX
} 1.2qh"#
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SortUtil： }q_Iep
heES [
package org.rut.util.algorithm; m,5m'9dj
SP=8v0
import org.rut.util.algorithm.support.BubbleSort; Cs]\3R|D`
import org.rut.util.algorithm.support.HeapSort; Ayw {I#"
import org.rut.util.algorithm.support.ImprovedMergeSort; K_j*9@
import org.rut.util.algorithm.support.ImprovedQuickSort; sz7<u|
import org.rut.util.algorithm.support.InsertSort; c[6<UkH7
import org.rut.util.algorithm.support.MergeSort; ?MRT
import org.rut.util.algorithm.support.QuickSort; ?S)Pv53>}
import org.rut.util.algorithm.support.SelectionSort; GOCe&?
import org.rut.util.algorithm.support.ShellSort; ZjK'gu8*
6C_H0a/h&
/** fsKZ
* @author treeroot Q9X+H4`}y
* @since 2006-2-2 MA=gCG/JD
* @version 1.0 )x,-O#"A
*/ y7b>>|C
public class SortUtil { Np opg1Gv>
public final static int INSERT = 1; xs)SKG*
public final static int BUBBLE = 2; ]o9^?iU]
public final static int SELECTION = 3; WD8F]+2O\
public final static int SHELL = 4; -<\hcV`&
public final static int QUICK = 5; (^|vN;
public final static int IMPROVED_QUICK = 6; KjV1->r#
public final static int MERGE = 7; gE&83i"
public final static int IMPROVED_MERGE = 8; ,PWMl[X
public final static int HEAP = 9; P1qnU
UN6nh T
public static void sort(int[] data) { jjoyMg95
sort(data, IMPROVED_QUICK); c=B!\J<1
} B%co`0$
private static String[] name={ ?DM!=.]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e>HdJ"S`
}; TwZmZE ?!
.L3D]
private static Sort[] impl=new Sort[]{ %&$s0=+
new InsertSort(), Vg`32nRN
new BubbleSort(), VPDd*32HC
new SelectionSort(), I(Q3YDdb
new ShellSort(), $=!_ !tr
new QuickSort(), CVgVyy^
new ImprovedQuickSort(), dJ,,yA*
new MergeSort(), G$iC@,/
new ImprovedMergeSort(), $0~_)$i:
new HeapSort() 8Vm)jnM
}; I|P#|0< 2
hRktvO)K
public static String toString(int algorithm){ <QRRD*\
return name[algorithm-1]; 2$> <rB
} JN<u4\e{-&
J+nUxF;EE
public static void sort(int[] data, int algorithm) { d/I*$UC
impl[algorithm-1].sort(data); G4K3qD#+H
} *46hw(L
K1|xatx1V
public static interface Sort { !-|{B3"6
public void sort(int[] data); >~* w
} ^14a[ta/'
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public static void swap(int[] data, int i, int j) { T oK'Pd
int temp = data; $tca: b}Mk
data = data[j]; }Lb[`H,}A
data[j] = temp; 2u^/yl
} a*UxRi8
} b~EA&dc