[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; )uj Ex7&c
} Rzbj
int i1=l; ^)(bM$(`
int i2=mid+1; ~P8tUhffK
for(int cur=l;cur<=r;cur++){ T>}5:,N~
if(i1==mid+1) 66/3|83Z
data[cur]=temp[i2++]; 5][Ztx
else if(i2>r) \`oT#|0
data[cur]=temp[i1++]; uC+V6;
else if(temp[i1] data[cur]=temp[i1++]; y.#")IAF
else dv8>[#
data[cur]=temp[i2++]; U3T#6Rptl
} cC=[Saatsf
} f&eK|7J_Yf
SM0~fAtE
} |Y$uqRdV
*)ardZV${
改进后的归并排序: 1crnmJ!C
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package org.rut.util.algorithm.support; UDL!43K
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import org.rut.util.algorithm.SortUtil; pk?w\A}
q qpgy7
/** PD&\LbuG
* @author treeroot u<3HQ.:;
* @since 2006-2-2 OMWbZ>jB
* @version 1.0 vwjPmOjhS
*/ rai3<_W<
public class ImprovedMergeSort implements SortUtil.Sort { ROg(U8 N
0fb`08,^
private static final int THRESHOLD = 10; u.d).da
C8[&S&<_<
/* &Q;sSIc
* (non-Javadoc) Ss~;m']68
* "x=f=;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !/}O>v~o
*/ <,Ue 0
public void sort(int[] data) { WM| dKF
int[] temp=new int[data.length]; wfU7G[
mergeSort(data,temp,0,data.length-1); eqP&8^HP
} $FlW1E j
As3.Q(#Z
private void mergeSort(int[] data, int[] temp, int l, int r) { LQ(yScA@
int i, j, k; [s"O mAy4
int mid = (l + r) / 2; jNLw=
if (l == r) YVYu:}e3)
return; $}J5xG,}$
if ((mid - l) >= THRESHOLD) (g[h 8 c
mergeSort(data, temp, l, mid); _A+s)]}
else B^j
insertSort(data, l, mid - l + 1); jT8#C=a7
if ((r - mid) > THRESHOLD) wF <n=
mergeSort(data, temp, mid + 1, r); XWA:J^
else D2](da:]8)
insertSort(data, mid + 1, r - mid); zo+nq%=
~%^ tB
for (i = l; i <= mid; i++) { bu:S:`
temp = data; ln?v j)j
} ;'5>q&[qbP
for (j = 1; j <= r - mid; j++) { (d(hR0HKE
temp[r - j + 1] = data[j + mid]; AvdXEY(-
} 7![,Q~Fy
int a = temp[l]; M,/mE~
int b = temp[r]; o*DN4oa)
for (i = l, j = r, k = l; k <= r; k++) { rG4';V^q
if (a < b) { MS\>DW
data[k] = temp[i++]; !G SV6
a = temp; v%"|WV[N
} else { e?7&M
data[k] = temp[j--]; Pl=ZRKn
b = temp[j]; R%Q@
} b~'"^ Bts*
} V,q](bg
} Pa{%\dsv
BFL`!^
/** uT}' Y)m
* @param data 5]n[]FW
* @param l V}dJ.I /#
* @param i FrTi+& <
*/ AWP"b?^G|
private void insertSort(int[] data, int start, int len) { ]|MEx{BG-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .Xce9C0SW
} 9[G[$c
} [x9KVd ^d
} 1+9W+$=h2
} POvP]G9'"
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堆排序： clNkph
R{ a"Y$
package org.rut.util.algorithm.support; Q^ pmQ
B[V+ND'(
import org.rut.util.algorithm.SortUtil; { jhr<
Z?%zgqTXb
/** XmEq2v
* @author treeroot kuol rfGB
* @since 2006-2-2 ;?8_G%va
* @version 1.0 tS|(K=$
*/ fjU8gV
public class HeapSort implements SortUtil.Sort{ $lLz3YS
c- }X_)U }
/* (non-Javadoc) vU767/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 95YL]3V
*/ %]>KvoA
public void sort(int[] data) { pgOQIzu
MaxHeap h=new MaxHeap(); @&1ZB6OCb:
h.init(data); }HY-uQ%@g
for(int i=0;i h.remove(); TNGU6j}oq
System.arraycopy(h.queue,1,data,0,data.length); BsEF'h'Owh
} hS)'a^FV
huJ&]"C
private static class MaxHeap{ jg.QRny^
Y8o)FVcyNy
void init(int[] data){ z"0I>gl
this.queue=new int[data.length+1]; 8Le||)y,\
for(int i=0;i queue[++size]=data; (>r[-Bft
fixUp(size); Cq%IE^g<
} )rekY;
} D|Q#gcWpo
,6om\9.E@
private int size=0; 3wC' r
:.$3vaZ@
private int[] queue; _NMm/]mN /
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public int get() { MOn
return queue[1]; 8P1=[i]
} ',:*f8Jk
`[W[H(AjQ
public void remove() { P*I}yPeb
SortUtil.swap(queue,1,size--); EL(nDv
fixDown(1); bI:zp!-.
} hJZV}a|
file://fixdown y *fDwd~
private void fixDown(int k) { fp+gyTnd3
int j; H[S%J3JI
while ((j = k << 1) <= size) { [[;e)SoA
if (j < size %26amp;%26amp; queue[j] j++; 6f\Lf?vF
if (queue[k]>queue[j]) file://不用交换 0a}u;gt,4w
break; jpO7'ivG
SortUtil.swap(queue,j,k); BK,{N0
k = j; 4iKgg[)7`=
} X{\F;Cb*
} `NgAT 3zq
private void fixUp(int k) { nv@8tdrc
while (k > 1) { ><gG8MH0'
int j = k >> 1; pKit~A,Q
if (queue[j]>queue[k]) bT^I"
break; %?p1d!
SortUtil.swap(queue,j,k); ~v6OsH%vx
k = j; =Ur}~w&H8
} aB7+Tb
} ][?G/*k
Ry%Mej:
} .6`9H 1
&(xH$htv1
} i 7x7xtq
wid;8%m
SortUtil： rvXWcu-"
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package org.rut.util.algorithm; ">y%iE
[Pq}p0cD
import org.rut.util.algorithm.support.BubbleSort; |MFF7z{%
import org.rut.util.algorithm.support.HeapSort; K':K{ee>
import org.rut.util.algorithm.support.ImprovedMergeSort; YKO){f5
import org.rut.util.algorithm.support.ImprovedQuickSort; ;#oie< Vit
import org.rut.util.algorithm.support.InsertSort; `Ye\p6v!+
import org.rut.util.algorithm.support.MergeSort; <8d^^0
import org.rut.util.algorithm.support.QuickSort; <N_+=_
import org.rut.util.algorithm.support.SelectionSort; IE9XU9Kd
import org.rut.util.algorithm.support.ShellSort; W9D86]3Y
j(RWO
/** j^^Ap
* @author treeroot >(?9?
* @since 2006-2-2 p;tVn{u
* @version 1.0 mR}6r2O2\Q
*/ DGAX3N;r6{
public class SortUtil { c6X}2a'
public final static int INSERT = 1; lzYnw)Pv
public final static int BUBBLE = 2; 6P5Ih
public final static int SELECTION = 3; ?34 e-
public final static int SHELL = 4; iVy7elT;R
public final static int QUICK = 5; y5do1Z
public final static int IMPROVED_QUICK = 6; -Xxqm%([71
public final static int MERGE = 7; pXJpK@z
public final static int IMPROVED_MERGE = 8; n#wI@W>%+
public final static int HEAP = 9; .zn;:M#T
Db;G@#x
public static void sort(int[] data) { DjN|Wr)*
sort(data, IMPROVED_QUICK); ;K!]4tfJ
} X_$Cb<e
private static String[] name={ +YqZ((
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $CY't'6Hn
}; j}~86JO+Cw
$+>M{fg?
private static Sort[] impl=new Sort[]{ WC.t_"@
new InsertSort(), kX>f^U{j
new BubbleSort(), Y0_),OaY
new SelectionSort(), ++V=s\d7
new ShellSort(), +;#Y]xy:
new QuickSort(), 7tcPwCc{
new ImprovedQuickSort(), qL6 |6-?
new MergeSort(), Y@b.sMg{
new ImprovedMergeSort(), l)!n/x_ !
new HeapSort() $aN&nhoO<
}; 21< j\ M
5lm<%
public static String toString(int algorithm){ d"6&AJ5a
return name[algorithm-1]; ,:Lb7bFv>
} [L:o`j
|=$-Wu
public static void sort(int[] data, int algorithm) { +eX@U;J,g
impl[algorithm-1].sort(data); 4)U.5FBk )
} ?84 s4BpV1
,ztI,1"k
public static interface Sort { ?ON-+u
public void sort(int[] data); !-,t'GF(
} #1c_evH
H Ge0hl[n
public static void swap(int[] data, int i, int j) { DM}YJ
int temp = data; 8[J}CdS
data = data[j]; /ig:9R
data[j] = temp; Um: Hrjw
} dO4{|(z
} AiK