[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; ~/4j&IG
} Fz8& Jn!
int i1=l; CMC p7-v
int i2=mid+1; !T`g\za/
for(int cur=l;cur<=r;cur++){ h(2{+Y+
if(i1==mid+1) SMvlEj^
data[cur]=temp[i2++]; djf8FNnn
else if(i2>r) !o'a]8
data[cur]=temp[i1++]; :V8oWMY
else if(temp[i1] data[cur]=temp[i1++]; xD7Y"%Pbx
else >a@1y8B
data[cur]=temp[i2++]; CEk[&39"
} -X EK[
} qUe2(/TQu
tklS=R^Vn
} !6.LSY,E
SFWS<H(IN
改进后的归并排序: GLY,<O>D5
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package org.rut.util.algorithm.support; El`G<esX
R "W=V
import org.rut.util.algorithm.SortUtil; 4xx?x/q
-b%' K}.C
/** 3rh t5n2-
* @author treeroot <O9WCl
* @since 2006-2-2 9Lt3^MKa"
* @version 1.0 Qm3RXO
*/ q+YK NXI
public class ImprovedMergeSort implements SortUtil.Sort { Xa8_kv_
5k_%%><: q
private static final int THRESHOLD = 10; N*w{NB7L
k:s86q
/* :)_P7k`>e/
* (non-Javadoc) bxz6 >>
* {flxZ}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aj+I+r"~
*/ 1eqFMf
public void sort(int[] data) { YWhS<}^
int[] temp=new int[data.length]; 9LEUj
mergeSort(data,temp,0,data.length-1); Y%rC\Ij/i
} %gEfG#S
ilj9&.isB
private void mergeSort(int[] data, int[] temp, int l, int r) { vP<8,XG
int i, j, k; .Wyx#9
int mid = (l + r) / 2; f#vVk
if (l == r) +QrbW
return; `WU"*HqW
if ((mid - l) >= THRESHOLD) 9%Ftln6
mergeSort(data, temp, l, mid); zQ eXN7$
else mK7egAo
insertSort(data, l, mid - l + 1); D #twS
if ((r - mid) > THRESHOLD) Y1FP |
mergeSort(data, temp, mid + 1, r); v?1xYG@1
else T xwZ3E
insertSort(data, mid + 1, r - mid); *}i.,4+y
b!|c:mE9|
for (i = l; i <= mid; i++) { G0h7MO%x
temp = data; ;-sF%c
} ?Da!QH >,]
for (j = 1; j <= r - mid; j++) { n|iO)L\9aB
temp[r - j + 1] = data[j + mid]; B1gBvss
} 5SY(:!
int a = temp[l]; :-.bXOB(
int b = temp[r]; hbdM}"&]
for (i = l, j = r, k = l; k <= r; k++) { X6@G)68
if (a < b) { {7X80KI
data[k] = temp[i++]; PM%Gsy]q
a = temp; -i?-Xj#%
} else { "Tm`V9
data[k] = temp[j--]; DbkKmv&
b = temp[j]; jkIgEF2d*
} o;@T6-VH
} D@>^_cTO24
} S2fBZ=V8
h{cJ S9e}
/** ON=6w_
* @param data WY%'ps_]<
* @param l t|aBe7t7
* @param i x, ^j=n
*/ mMvt#+O
private void insertSort(int[] data, int start, int len) { r6`v-TY(/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /uzU]3KF~
} W]rK*Dc
} Ytnk^/Z1L
} 50.cMms
} i7w>Nvj]
,$96bF "#
堆排序： um[nz
*.J)7~(P
package org.rut.util.algorithm.support; AVA hS}*t
PI#xRKt
import org.rut.util.algorithm.SortUtil; G_~w0r#
@4D$Xl
/** G~I@'[ur
* @author treeroot x\Bl^1&
* @since 2006-2-2 <o";?^0Q
* @version 1.0 G.,dP+i
*/ H1>}E5^?
public class HeapSort implements SortUtil.Sort{ Nj_h+=UE!
IR,`-
/* (non-Javadoc) MGd 7Ont
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^xO CT=V
*/ /,z4tf
public void sort(int[] data) { mpBSd+;Z
MaxHeap h=new MaxHeap(); %W=S*"e-
h.init(data); #$QC2;/)F
for(int i=0;i h.remove(); AAE8j.
System.arraycopy(h.queue,1,data,0,data.length); #]'#\d#i
} ((TiBCF4
V_?5cwZ
private static class MaxHeap{ vcnUb$%
%SL'X`j
void init(int[] data){ #N?EPV$
this.queue=new int[data.length+1]; NZSP*#!B
for(int i=0;i queue[++size]=data; ]VY}VALZ
fixUp(size); WhsTKy&E
} {1.t ZCMT
} F7wpGtt
wIIxs_2Q0c
private int size=0; /ov&h;
K)c`G_%G
private int[] queue; j()<.h;'
A"8`5qa
public int get() { SyFOf
return queue[1]; TOp|Qtn
} \-Mzs 0R
<taN3
public void remove() { tY^MP5*
SortUtil.swap(queue,1,size--); L,L>cmpM
fixDown(1); {#aW")x^#
} e$M \HPc
file://fixdown !N--
private void fixDown(int k) { p}%T`e=Z9
int j; ;ZMm6o
while ((j = k << 1) <= size) { E(F<shT#
if (j < size %26amp;%26amp; queue[j] j++; 6vySOVMj
if (queue[k]>queue[j]) file://不用交换 =Jd('r
break; y -j3d)T
SortUtil.swap(queue,j,k); c=iv\hn
k = j; bLyU;
} <RfPd+</
} OTs vox|(
private void fixUp(int k) { Zi5d"V[}T
while (k > 1) { y%A!|aBu
int j = k >> 1; WZ@/'[
if (queue[j]>queue[k]) QZ!;` ?(
break; ],l w
SortUtil.swap(queue,j,k); *5'U3py
k = j; 'k[O?}
} .:?X<=!S&t
} f>\guuG
I^>m-M.
} }!=}g|z#|
#p@8m_g
} R4+Gmx1
/,v>w,
SortUtil： es}j6A1
'r;C(Gh6
package org.rut.util.algorithm; 3T)GUzt`
j{00iA}
import org.rut.util.algorithm.support.BubbleSort; 4FK|y&p4r
import org.rut.util.algorithm.support.HeapSort; d1YE$
import org.rut.util.algorithm.support.ImprovedMergeSort; 88\0opL-
import org.rut.util.algorithm.support.ImprovedQuickSort; bqjj6bf'o
import org.rut.util.algorithm.support.InsertSort; #jdo54-
import org.rut.util.algorithm.support.MergeSort; IR; DdF
import org.rut.util.algorithm.support.QuickSort; ;Ml??B]C
import org.rut.util.algorithm.support.SelectionSort; ^MJTlRUb
import org.rut.util.algorithm.support.ShellSort; {k.Dy92
2 MFGKzO
/** 3QlV,)}
* @author treeroot r83chR9
* @since 2006-2-2 9GdQ$^m
* @version 1.0 $6\-8zNk
*/ e!cZW.B=`f
public class SortUtil { Pe_mX*0
public final static int INSERT = 1; d5?"GFy
public final static int BUBBLE = 2; TNYd_:j
public final static int SELECTION = 3; #P:o
public final static int SHELL = 4; Q}#5mf&cD
public final static int QUICK = 5; b"x[+&%i
public final static int IMPROVED_QUICK = 6; DoV<p?U
public final static int MERGE = 7; mIu-
public final static int IMPROVED_MERGE = 8; >y<yFO{
public final static int HEAP = 9; 4h:R+o ^H^
ISo{>@a-
public static void sort(int[] data) { 6L--FY>.-
sort(data, IMPROVED_QUICK); yl63VX8w}
} A)I4 `3E
private static String[] name={ y?BzZ16\bL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NXhQdf
}; 6*@\Qsp615
rSTc4m1R
private static Sort[] impl=new Sort[]{ &=SP"@D
new InsertSort(), cI#2MjL
new BubbleSort(), @D.]PZf
new SelectionSort(), }Ip"j]h
new ShellSort(), gemjLuf
new QuickSort(), ~r~~0|=
new ImprovedQuickSort(), ]s lYr8m
new MergeSort(), @d5G\1(%
new ImprovedMergeSort(), IT \Pj_
new HeapSort() S30@|@fTz
}; |JVeW[C
i?^Cc\gH
public static String toString(int algorithm){ ?Z}n0E `
return name[algorithm-1]; ^/+0L[R
} 5H_%inWM
QiU!;!s
public static void sort(int[] data, int algorithm) { \-c8/=
impl[algorithm-1].sort(data); ,WF)GS|7V
} a$p2I+lX
YM9oVF-
public static interface Sort { MxiU-
public void sort(int[] data); zdA:K25"
} q?C)5(
[0GM!3YJ7
public static void swap(int[] data, int i, int j) { WWF#&)ti
int temp = data; UXB[3SP
data = data[j]; ^&t(O1.-
data[j] = temp; ?i4}[q
} S3"js4a
} DI=Nqa)r