[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; e<1Ewml(]
} j_}:=3
int i1=l; #9[>
int i2=mid+1; Q[NoFZ V!
for(int cur=l;cur<=r;cur++){ z{w %pUn}
if(i1==mid+1) O9By5j 4
data[cur]=temp[i2++]; e>e${\=,
else if(i2>r) I9+h-t
data[cur]=temp[i1++]; "PRHQW
else if(temp[i1] data[cur]=temp[i1++]; >I~Q[
else #\Y`?
data[cur]=temp[i2++]; P,)D0i
} d@{12hq
} XtZd% #2},
-o"b$[sf=Z
} zo"L9&Hzo
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改进后的归并排序: S{&%tj~U
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package org.rut.util.algorithm.support; I|&DXF
e }C,)
import org.rut.util.algorithm.SortUtil; E+XS7':I
fm^`
/** J>T98y/))
* @author treeroot q#c+%,Z=C
* @since 2006-2-2 j~ds)dW%`&
* @version 1.0 ySiZ@i4
*/ PZJn/A1
public class ImprovedMergeSort implements SortUtil.Sort { vO9=CCxvq
~:Z|\a58j
private static final int THRESHOLD = 10; Jv3G\9_
$X Uck[
/* &W<9#RPK'
* (non-Javadoc) PbvA~gm
* 9QHj$)?k,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R|)l^~x
*/ :qj^RcmVPL
public void sort(int[] data) { ~PyS;L}
int[] temp=new int[data.length]; Gq[5H(0/c
mergeSort(data,temp,0,data.length-1); 7@gH{p1
} 3p HI+a
RaSuzy^`*]
private void mergeSort(int[] data, int[] temp, int l, int r) { +(:Qf+:
int i, j, k; G/3T0d+-
int mid = (l + r) / 2; ;J+iwS*Z
if (l == r) kGnT4R*E
return; d42Y`Wu
if ((mid - l) >= THRESHOLD) ;?iu@h
mergeSort(data, temp, l, mid); @IbZci)1
else T<Y*();Zo
insertSort(data, l, mid - l + 1); L{IMZ+IB2|
if ((r - mid) > THRESHOLD) MRo_An+
mergeSort(data, temp, mid + 1, r); 9wf"5c
else "S'Yn-
insertSort(data, mid + 1, r - mid); `q^qe>'
G~&8/ s
for (i = l; i <= mid; i++) { ZVdQ$
temp = data; NA0Z~Ug>
} {0,6-dd5
for (j = 1; j <= r - mid; j++) { {y5 L
temp[r - j + 1] = data[j + mid]; &D-z|ZjgHi
} d:A'|;']
int a = temp[l]; 7>r[.g
int b = temp[r]; w1zMY:9
for (i = l, j = r, k = l; k <= r; k++) { Ug0c0z!b
if (a < b) { &|'yqzS3
data[k] = temp[i++]; 9vDOSwU*
a = temp; ydY(*]
} else { HWFTI /]
data[k] = temp[j--]; 6/g 82kqpk
b = temp[j]; 54WX#/<Yik
} ()Wu_Q
} FaWc:GsfB
} byt$Wqdl
QAo/d4
/** ->IZZ5G<
* @param data Br<lP#u=G
* @param l #Q=c.AL{
* @param i BaP'y8dVN
*/ 2-UD^;0
private void insertSort(int[] data, int start, int len) { oz]3 Tx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wRK27=\z
} @aFk|.6
} Cq<Lj
} .dxELSV
} Fx1FxwIJ
WQ:Y NmQ1p
堆排序： !or_CJ8%
csJ)Pt?d
package org.rut.util.algorithm.support; }Cfl|t<5f
?+Vi !eS
import org.rut.util.algorithm.SortUtil; >hG*=4oh
mv,a>Cvs[
/** !RwhVaSh
* @author treeroot ?5};ONjN
* @since 2006-2-2 X+u1p?
* @version 1.0 M5:*aCN6P
*/ ,|zzq@fk
public class HeapSort implements SortUtil.Sort{ g$Vr9MH
p0CPeH
/* (non-Javadoc) #E\6:UnT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f2Xn!]o
*/ ~g#/q~UE
public void sort(int[] data) { )~"0d;6_
MaxHeap h=new MaxHeap(); `0_ Y| 4KB
h.init(data); a ^juZ
for(int i=0;i h.remove(); #v~dhx=R
System.arraycopy(h.queue,1,data,0,data.length); ~d\V>
} ",Mrdxn7
QKVOc,Fp7i
private static class MaxHeap{ 2w+4B4
o.zP1n|G~r
void init(int[] data){ :mLXB75gH
this.queue=new int[data.length+1]; 'YbE%i}
for(int i=0;i queue[++size]=data; ij3W8i9'
fixUp(size); cCx{ ")
} )~nieQEZQ
} eFA,xzp
DC BN89#
private int size=0; )^6Os2
rHOhi|+
private int[] queue; fshG ~L7S9
`pDTjJ
public int get() { 4 540Lw'A
return queue[1]; G7-k ,P^
} gyh8
?0JNaf
public void remove() { ;qWSfCt/^
SortUtil.swap(queue,1,size--); 9OY ao
fixDown(1); rb'mFqg*u
} vLq%k+D#
file://fixdown >mEfd=p
private void fixDown(int k) { 5.yiNWh
int j; YvP62c \
while ((j = k << 1) <= size) { M ]O4
if (j < size %26amp;%26amp; queue[j] j++; Ux=B*m1@{
if (queue[k]>queue[j]) file://不用交换 4Xt`L"f
break; jk\V2x@DR
SortUtil.swap(queue,j,k); VUHf-bKl
k = j; yxf#@Je"
} Lg#(?tMp,'
} [>3dhj[;
private void fixUp(int k) { cF9oo%3
while (k > 1) { mU]^PC2[
int j = k >> 1; {&B0kjf
if (queue[j]>queue[k]) !g=b=YK
break; `GCK%evLG
SortUtil.swap(queue,j,k); 5e0d;Rd
k = j; E:PPb9Kd
} %,ScGQE
} g4+Hq *
aX|(%1r
} |m@>AbR5dk
zzW$F)X
} ~.0'v [N
8xhx*A
SortUtil： +KNd%AJ
HNj;_S
package org.rut.util.algorithm; |Sua4~yL(
@'?gan#(
import org.rut.util.algorithm.support.BubbleSort; 72*j6#zS
import org.rut.util.algorithm.support.HeapSort; \n^[!e"`
import org.rut.util.algorithm.support.ImprovedMergeSort; |R!ozlL{}
import org.rut.util.algorithm.support.ImprovedQuickSort; g)|vS>^~
import org.rut.util.algorithm.support.InsertSort; EN}XIa>R
import org.rut.util.algorithm.support.MergeSort; IXm[c@5l
import org.rut.util.algorithm.support.QuickSort; *n[BBz
import org.rut.util.algorithm.support.SelectionSort; ib!TXWq
import org.rut.util.algorithm.support.ShellSort; X-TGrdoX
Y3(I;~$!
/** |k%1mE(+=s
* @author treeroot zn_#}}e;G
* @since 2006-2-2 WpnP^gmX
* @version 1.0 EVw{G<
*/ R osU~OK
public class SortUtil { "Ehh9 m1&
public final static int INSERT = 1; >+Iph2]
public final static int BUBBLE = 2; Em5,Zr_
public final static int SELECTION = 3; ;c DMcKKIA
public final static int SHELL = 4; LXhR"PWZM\
public final static int QUICK = 5; ;Bzx}7A
public final static int IMPROVED_QUICK = 6; H=g%>W%3
public final static int MERGE = 7; `8Ych@f]
public final static int IMPROVED_MERGE = 8; 6KXW]a `
public final static int HEAP = 9; vH1,As
u^CL }t*
public static void sort(int[] data) { Ht\2 IP
sort(data, IMPROVED_QUICK); tns8B
} n~}[/ly
private static String[] name={ MV!d*\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j|N<6GSke
}; ) jvI Nb
?TK`sGy
private static Sort[] impl=new Sort[]{ 2k^rZ^^"
new InsertSort(), >w,jaQ
new BubbleSort(), 6-)WXJ@V
new SelectionSort(), g`fMHU7
new ShellSort(), Fu5Y<*x
new QuickSort(), )Ho"b
new ImprovedQuickSort(), 4#]g852
new MergeSort(), 1@h8.ym<"
new ImprovedMergeSort(), .y3E@0a
new HeapSort() ]7yxXg
}; o^*:
P3Lsfi.
public static String toString(int algorithm){ >P\eHR,{-
return name[algorithm-1]; Gau@RX:O
} : xggo
w\eC{,00:
public static void sort(int[] data, int algorithm) { rBi<Yy$z
impl[algorithm-1].sort(data); WG,1%=M@
} XBkaum4j
a7F_{Mm
public static interface Sort { 1IS1P)4_0
public void sort(int[] data); <g;,or#$
} 8AY;WL:;
dh [kx
public static void swap(int[] data, int i, int j) { SOM? 0.
int temp = data; *i:8g(
data = data[j]; Q#Zazvk
data[j] = temp; a=A12<
} <#nU 06 fN
} fDplYn#