[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; ~8lwe*lNV
} r/SG 4
int i1=l; _-EyT
int i2=mid+1; 3YVi" k?2
for(int cur=l;cur<=r;cur++){ -|E!e.^7:
if(i1==mid+1) ;VWAf;U;B
data[cur]=temp[i2++]; $sEy%-
else if(i2>r) 'Fmvu
data[cur]=temp[i1++]; o<N nV
else if(temp[i1] data[cur]=temp[i1++]; EVoEszR
else TYy.jFT-
data[cur]=temp[i2++]; V{JAB]?^
} 6L)%T02C
} -;'1^
R)c'#St
} gvLf|+m
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改进后的归并排序: ]C) 4
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package org.rut.util.algorithm.support; )b:7-}d
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import org.rut.util.algorithm.SortUtil; B[KJR?>
aoXb22]{
/** B'fb^n<
* @author treeroot l,kUhZ@W
* @since 2006-2-2 #FNcF>3>
* @version 1.0 lyGhdgWc
*/ JYTP 2
public class ImprovedMergeSort implements SortUtil.Sort { Y./2Ely
2sJ(awN>
private static final int THRESHOLD = 10; 92 [;Y
3\B>lKhQ
/* 2RX!V@z.G
* (non-Javadoc) sQ fFu
* L31HGH2l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8?%-'z.
*/ 7x@A%2J
public void sort(int[] data) { YxP&7oq
int[] temp=new int[data.length]; 7(5 4/
mergeSort(data,temp,0,data.length-1); >"C,@cN}B
} 62Z#YQ}x
jrS[f
private void mergeSort(int[] data, int[] temp, int l, int r) { 1&- </G#
int i, j, k; )'~6HO8Z
int mid = (l + r) / 2; ={z*akn,
if (l == r) RRI"d~~F6
return; -:na:Vsi
if ((mid - l) >= THRESHOLD) PbmDNKEh{
mergeSort(data, temp, l, mid); S;)w.
else 6Aku1h
insertSort(data, l, mid - l + 1); tQjLOv+?=
if ((r - mid) > THRESHOLD) @~%r5pz6
mergeSort(data, temp, mid + 1, r); kOed ]>H
else "T|PS6R~
insertSort(data, mid + 1, r - mid); ^pYxKU_O
4y+< dw
for (i = l; i <= mid; i++) { AT%u%cE-
temp = data; o}$EG
} 2* 2wY=
for (j = 1; j <= r - mid; j++) { }yz (xH
temp[r - j + 1] = data[j + mid]; Jl&-,Vjb
} %oO4|JkJX
int a = temp[l]; 7:2WgLo
int b = temp[r]; !Ze5)g%H
for (i = l, j = r, k = l; k <= r; k++) { 4 XAQVq5
if (a < b) { sashzVwJ-=
data[k] = temp[i++]; NB8/g0:=n&
a = temp; (,8$V\
} else { [Lzw#XE
data[k] = temp[j--]; MerFZd 1
b = temp[j]; Gy6l<:;
} } x2DT8u
} fc |GArL#}
} @CT;g\4
FGoy8+nB1M
/** ;9c<K
* @param data eb=D/
* @param l #':fkIYe'
* @param i {62n7'U{
*/ QC9eUYe
private void insertSort(int[] data, int start, int len) { fP(d8xTx2y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m+Rv+_R
} K[!&b0O
} [_Qa9e
} ;oc&Hb
} IWY;="
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堆排序： IyWI5Q"t
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package org.rut.util.algorithm.support; Y4v|ko`l%
OR;uqV@
import org.rut.util.algorithm.SortUtil; FSA1gAW6g
'7iSp=
/** )3>hhuaa
* @author treeroot {qN 5MsY
* @since 2006-2-2 Ro9tZ'N!S
* @version 1.0 id1s3b;
*/ E(Z8
public class HeapSort implements SortUtil.Sort{ mD^jd+
w.?:SD
/* (non-Javadoc) WjlZ6g2i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xo7Kn+ Kl
*/ a+%6B_|\
public void sort(int[] data) { :(M(>4t
MaxHeap h=new MaxHeap(); "CI=`=
h.init(data); !0vG|C;'
for(int i=0;i h.remove(); uA#P'?
System.arraycopy(h.queue,1,data,0,data.length); T-U}QM_e
} 'LO^<
:gep:4&u
private static class MaxHeap{ 2fWTY0
`wDl<[V
void init(int[] data){ ,uSQNre\j
this.queue=new int[data.length+1]; f PM8f
for(int i=0;i queue[++size]=data; *U P@9D
fixUp(size); EV*IoE$W]=
} d%V*|0c)
} @n{JM7ctJ
[E/\#4b
private int size=0; V;,{}
qLB)XnQ
private int[] queue; a 0GpfW$t
AMyIAZnYq)
public int get() { B>0].CK`
return queue[1]; gk0(ANx
} fmb} 2h
"HDcmIXg&
public void remove() { mqSQL}vR
SortUtil.swap(queue,1,size--); ^h"`}[+
fixDown(1); ?'KL11@R
} @NNq z
file://fixdown 4UW_Do
private void fixDown(int k) { #0y)U;dA+w
int j; \cUC9/ b
while ((j = k << 1) <= size) { +O*/"]h
if (j < size %26amp;%26amp; queue[j] j++; +7=K/[9p
if (queue[k]>queue[j]) file://不用交换 z<##g
break; mjKS{
SortUtil.swap(queue,j,k); Yd#/1!A7u
k = j; B(n{e53 9f
} hHT_V2*
} z$?~Y(EY
private void fixUp(int k) { +h r@#n4A
while (k > 1) { 4Za7^c.
int j = k >> 1; Ljx(\Cm
if (queue[j]>queue[k]) &3TEfvz
break; X ><?F|#7T
SortUtil.swap(queue,j,k); $D|e>U
k = j; \l]DQaOEe
} tavpq.0O
} i03w1pSH,
rU2%dkTa
} K"4>DaK2P
ck.w 5|$
} D0%Ug>
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SortUtil： Te<}*qvD
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package org.rut.util.algorithm; :n.f_v}6
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import org.rut.util.algorithm.support.BubbleSort; :uK?4
import org.rut.util.algorithm.support.HeapSort; ecCr6)
import org.rut.util.algorithm.support.ImprovedMergeSort; T`;%TO*Y
import org.rut.util.algorithm.support.ImprovedQuickSort; {O7X`'[
import org.rut.util.algorithm.support.InsertSort; %\H|B0
import org.rut.util.algorithm.support.MergeSort; `m!j$,c.
import org.rut.util.algorithm.support.QuickSort; _U |>b>
import org.rut.util.algorithm.support.SelectionSort; CkdP#}f
import org.rut.util.algorithm.support.ShellSort; ^7 &5 z&o
Ipq"E
/** ~s]iy9i
* @author treeroot 8p@Piy{p
* @since 2006-2-2 [g:$K5\64
* @version 1.0 /M3Y~l$
*/ jO1r)hw N>
public class SortUtil { (tZrw5@
public final static int INSERT = 1; /.o^R6
public final static int BUBBLE = 2; .2v_H5<
public final static int SELECTION = 3; .MJofE;Jn
public final static int SHELL = 4; ^wc"&;=c|
public final static int QUICK = 5; EuyXgK>g
public final static int IMPROVED_QUICK = 6; /q5v"iX]T
public final static int MERGE = 7; 37|&?||
public final static int IMPROVED_MERGE = 8; ak |WW]R
public final static int HEAP = 9; z2QP)150
g'V>_u#(
public static void sort(int[] data) { -1UD0(
sort(data, IMPROVED_QUICK); D-4f >
} 7zSLAHW
private static String[] name={ NT+?#0I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z^IPZF
}; #>mr[
Qg[/%$x.
private static Sort[] impl=new Sort[]{ ;[u%_
new InsertSort(), obNqsyc77R
new BubbleSort(), p|&Yku=
new SelectionSort(), /5:bvg+
new ShellSort(), 7[5.> h
new QuickSort(), }7 c[Q($K
new ImprovedQuickSort(), \V*xWS
new MergeSort(), .5y+fL
new ImprovedMergeSort(), 1r]IogI
new HeapSort() ;bLEL"x%
}; 8_tK4PwP
HP3lz,d
public static String toString(int algorithm){ _q{c##Kf
return name[algorithm-1]; (KF=On;=Y
} Ooq! 0g
v4.#;F.\m
public static void sort(int[] data, int algorithm) { oWC@w
impl[algorithm-1].sort(data); D(H>R&b!
} &qr;IL7'
TG+VEL |T
public static interface Sort { Ndcg/d
public void sort(int[] data); :X]itTrGs
} kMt 8/E`
< VSA
public static void swap(int[] data, int i, int j) { jhg;%+KB
int temp = data; ?)1{)Erf8x
data = data[j]; GP:77)b5
data[j] = temp; R5 9S@MsuD
} UM6(s@$
} s8#X3Rp