[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; 5zWxI]4d\
} o$8v8="p
int i1=l; t9685s
int i2=mid+1; /p+ (_Y
for(int cur=l;cur<=r;cur++){ `9}\kn-</8
if(i1==mid+1) (p08jR '5
data[cur]=temp[i2++]; m_LW<'
else if(i2>r) z|;7;TwA
data[cur]=temp[i1++]; Sp3?I2 o
else if(temp[i1] data[cur]=temp[i1++]; K+5S7wFDZ
else eLXG _Qb"
data[cur]=temp[i2++]; _h",,"p#o
} fOs"\Y4
} }J"}5O2,b
^R',P(@oL
} }u8o*P|,
c%9wI*l
改进后的归并排序: tkx1iBW=
,iY/\ U''
package org.rut.util.algorithm.support; (=cR;\s<
AQ:cim`
import org.rut.util.algorithm.SortUtil; mZDL=p
P#H|at
/** KLK '_)|CT
* @author treeroot RLBjl%Q>
* @since 2006-2-2 }JyWy_Y
* @version 1.0 ^_BHgbS%;
*/ b37P[Q3
public class ImprovedMergeSort implements SortUtil.Sort { ij i<+oul
lL_M=td8W
private static final int THRESHOLD = 10; S(<r-bV<
m2{3j[
/* ,&[2z!
* (non-Javadoc) bkk1_X
* x-O9|%aRJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HH =sq
*/ &(a#I]`9M
public void sort(int[] data) { oxT..=-
int[] temp=new int[data.length]; yDh(4w-~gk
mergeSort(data,temp,0,data.length-1); SJ$N]<d
} |d}f\a`
-{H;w=9
private void mergeSort(int[] data, int[] temp, int l, int r) { Gh;Ju[6
int i, j, k; _):V7Zv
int mid = (l + r) / 2; l1BbL5#1Q>
if (l == r) s*$Re)}S
return; m:|jv|f
if ((mid - l) >= THRESHOLD) wT/TQEgz
mergeSort(data, temp, l, mid); <%WN<T{q|
else CMI'y(GN
insertSort(data, l, mid - l + 1); Qx{k_ye`
if ((r - mid) > THRESHOLD) F)P"UQ!\
mergeSort(data, temp, mid + 1, r); 3Jt_=!qlo
else *h6Lh]7
insertSort(data, mid + 1, r - mid); ;4XvlcGo
|tL57Wu93
for (i = l; i <= mid; i++) { bH+x `]{A
temp = data; i oCoFj
} .Y B}w
for (j = 1; j <= r - mid; j++) { {;.q?mj
temp[r - j + 1] = data[j + mid]; U^jxKBq^
} ~&-8lD];LM
int a = temp[l]; "JI FF_
int b = temp[r]; P(OgT/7A
for (i = l, j = r, k = l; k <= r; k++) { UUb n7&
if (a < b) { n#@/A
data[k] = temp[i++]; 27mGX\T
a = temp; ="E^9!
} else { ~3k& =3d]
data[k] = temp[j--]; s|iph~W!L
b = temp[j]; "-aak )7w
} gq9D#B
} CNwYQe-i
} QoZ7l]^
~"\qX+
/** h{zE;!+)D
* @param data [NQ\(VQ1c
* @param l GdZ_
* @param i Nxk3uF^
*/ VayU
private void insertSort(int[] data, int start, int len) { Nda,G++5(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a*4"j2j v
} <~aQ_l
} ~ou1{NS
} QuuR_Ao?c'
} C;m7~R
,:yv T6)p
堆排序： D&1*,`
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package org.rut.util.algorithm.support; j.C)KwelBS
"=~P&Mi_
import org.rut.util.algorithm.SortUtil; W}+f}/&l
eF8!}|*N
/** }7k!>+eQ
* @author treeroot 0,)Ao8
* @since 2006-2-2 XD\RD
* @version 1.0 h&|wqna
*/ NwQexYm1_
public class HeapSort implements SortUtil.Sort{ Y-(),k_Q:
+ -e8MvP
/* (non-Javadoc) tT7< V{i4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |&ISZFSv
*/ <:#O*Y{
public void sort(int[] data) { xl5n(~g)p
MaxHeap h=new MaxHeap(); '&L;y
h.init(data); by*>w/@9)k
for(int i=0;i h.remove(); :SxOQ(n
System.arraycopy(h.queue,1,data,0,data.length); 3#>;h
} ZdQm&?
A`4Di8'Me
private static class MaxHeap{ />fP )56*
Qy ; M:q
void init(int[] data){ OHnHSb'?\
this.queue=new int[data.length+1]; '[shY
for(int i=0;i queue[++size]=data; %gd=d0vm
fixUp(size); O[RmQ8ll
} G9\Bi-'ul
} #8;|_RU
9kPwUAw
private int size=0; fShf4G_w\
A.9,p
private int[] queue; -&Fxg>FrYb
y:!MWZ
public int get() { ^RkHdA
return queue[1]; @aR! -}
} ~CRr)(M
"Kk3#
public void remove() { ZTG*|
SortUtil.swap(queue,1,size--); w<_.T#
fixDown(1); #bPio
} *BVkviqxz
file://fixdown cL*D_)?8
private void fixDown(int k) { G8`q-B}q
int j; ]I"oS?
while ((j = k << 1) <= size) { R!xs;|]
if (j < size %26amp;%26amp; queue[j] j++; F#_7mC
if (queue[k]>queue[j]) file://不用交换 64}Oa+*s
break; 87EI<\mP
SortUtil.swap(queue,j,k); ".| 9h
k = j; 7\^b+*
} .LafP}%
} D8_m_M|P
private void fixUp(int k) { 9QJ=?bIC#
while (k > 1) { /s6':~4
int j = k >> 1; KtHh--j`
if (queue[j]>queue[k]) :c,\8n
break; yY*OAC
SortUtil.swap(queue,j,k); }jTEgog
k = j; j._9;HifZ
} O7j$bxk/^
} aEX;yy*
\~xsBPX+x
} c[<lr
}"fP,:n"KN
} po"M$4`9
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SortUtil： 2Iz@lrO6
}*$-rieg
package org.rut.util.algorithm; F=B>0Q5
M#})
import org.rut.util.algorithm.support.BubbleSort; EBw}/y{Kt
import org.rut.util.algorithm.support.HeapSort; ,{itnKJC
import org.rut.util.algorithm.support.ImprovedMergeSort; KK]AX;
import org.rut.util.algorithm.support.ImprovedQuickSort; PK3)M'[
import org.rut.util.algorithm.support.InsertSort; yqlkf$?
import org.rut.util.algorithm.support.MergeSort; 0$&Z_oJ
import org.rut.util.algorithm.support.QuickSort; 'm}~
import org.rut.util.algorithm.support.SelectionSort; i1vBg}WHN
import org.rut.util.algorithm.support.ShellSort; D8h?s
GfQMdLy\Z
/** wias]u|
* @author treeroot Sijwh1j*V
* @since 2006-2-2 <3HW!7Ad1
* @version 1.0 o'myo.k{
*/ DXKk1u?Tq
public class SortUtil { FlVGi3
public final static int INSERT = 1; 8<)[+@$0
public final static int BUBBLE = 2; -K}@Gp
public final static int SELECTION = 3; 6$SsdT|8B
public final static int SHELL = 4; JS&l h
public final static int QUICK = 5; &[S)zR=?
public final static int IMPROVED_QUICK = 6; (U!WD`Ym
public final static int MERGE = 7; sPkT>q
public final static int IMPROVED_MERGE = 8; :BMUc-[
public final static int HEAP = 9; jSVb5P
a<!g*UVL0M
public static void sort(int[] data) { 3dadeu^{A
sort(data, IMPROVED_QUICK); a+\Gz
} n{Jvx>);
private static String[] name={ X~GZI*P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _PNU*E%s<
}; zCO5`%14
34JkB+#a
private static Sort[] impl=new Sort[]{ v.r$]O
new InsertSort(), $6fHY\i#R
new BubbleSort(), F\-qXSA
new SelectionSort(), Wf: AMxDm
new ShellSort(), (O&~*7D*
new QuickSort(), 6EX:qp^`
new ImprovedQuickSort(), PK3T@Qv89
new MergeSort(), a^Zn }R r
new ImprovedMergeSort(), cY\-e?`=4
new HeapSort() YqNhD6
}; B TcxBh
zb9d{e
public static String toString(int algorithm){ .^JID~<?#
return name[algorithm-1]; Fdc bmQ
} H7qda'%>
cO(|>&tJ
public static void sort(int[] data, int algorithm) { f_raICO{R
impl[algorithm-1].sort(data); [>"qOFCr#:
} NSHlo*)}
ZP%^.wxC
public static interface Sort { ?r'b Z~
public void sort(int[] data); LgUaX
} jgEiemh&
Q~-gtEv+&
public static void swap(int[] data, int i, int j) { qx_+mCZ
int temp = data; *vBcT.|,
data = data[j]; :4Q_\'P
data[j] = temp; a |z{Bb
} qQpR gzw
} deeOtco$LT