[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; .WW|v
} \0^Je>-:U
int i1=l; oF5~|&C
int i2=mid+1; M V~3~h8
for(int cur=l;cur<=r;cur++){ |f+fG=a67V
if(i1==mid+1) =M34 HPG
data[cur]=temp[i2++]; S!7|vb*ko
else if(i2>r) \2)~dV:6+
data[cur]=temp[i1++]; 'tq4-11xB
else if(temp[i1] data[cur]=temp[i1++]; FdMTc(>
else e:=+~F(f
data[cur]=temp[i2++]; ks<+gL{K|i
} 4% 2MY\
} dxF)) Z
6Xt c3
} $`Aps7A
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改进后的归并排序: Iyt.`z
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package org.rut.util.algorithm.support; lf2(h4[1R
h=ko_/<
import org.rut.util.algorithm.SortUtil; H`8}w{ft&
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/** Ert` ]s~
* @author treeroot DgC;1U'
* @since 2006-2-2 W/<C$T4
* @version 1.0 ((]Sy,rdk
*/ &+8cI^kp
public class ImprovedMergeSort implements SortUtil.Sort { 'V:ah38
e>$E67h<~
private static final int THRESHOLD = 10; FeuqqZ\=&
hdxq@%Vs
/* >3y:cPTM5
* (non-Javadoc) >66v+
* >/DlxYG?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IVSd,AR7yY
*/ YW^sf,zQ
public void sort(int[] data) { b`DPf@p^kc
int[] temp=new int[data.length]; ~.8p8\H
mergeSort(data,temp,0,data.length-1); R8fB 8 )
} LT)G"U~
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private void mergeSort(int[] data, int[] temp, int l, int r) { Z=>#|pW,)
int i, j, k; [xg&`x9,.
int mid = (l + r) / 2; .V|o-~c
if (l == r) J, vEZT<Mt
return; 4'0rgS
if ((mid - l) >= THRESHOLD) EnXTL]=0S
mergeSort(data, temp, l, mid); X##hSGQM
else BW&)Zz
insertSort(data, l, mid - l + 1); _.3O(?p,
if ((r - mid) > THRESHOLD) 5KwT(R o
mergeSort(data, temp, mid + 1, r); ]jwF[D
else UU]a).rz
insertSort(data, mid + 1, r - mid); +[$ Q C*
nL&[R}@W
for (i = l; i <= mid; i++) { f;%\4TH?
temp = data; #N `Z)}Jm
} @(LEuYq}
for (j = 1; j <= r - mid; j++) { 8hm|9
temp[r - j + 1] = data[j + mid]; 5j-?Uf
} bupDnTF
int a = temp[l]; MbjMO"}
int b = temp[r]; i?CXDuL
for (i = l, j = r, k = l; k <= r; k++) { }`$Sr&n 1
if (a < b) { .wz.Jr`{
data[k] = temp[i++]; S(h+,+289
a = temp; \>r<z46x
} else { %v 1NDhaXz
data[k] = temp[j--]; 53X5&Bwh
b = temp[j]; ^jZ4tH3K
} SpiI9)gp
} 3+2cD
} e2$k %c~
/l$>W<}@
/** K na
* @param data JO"-"&>
* @param l sc &S0K
* @param i fr([g?F%D
*/ ,xsFBNCC
private void insertSort(int[] data, int start, int len) { )%]`uj>*[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w#\*{EN
} uj9IK
} u}I\!-EX!v
} or]kXefG3
} \-~TW4dYe
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堆排序： @XFy^?
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package org.rut.util.algorithm.support; =dTsGNz
b(|1DE0Cv
import org.rut.util.algorithm.SortUtil; mu}T,+9\
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/** JVeb$_0k
* @author treeroot Ju.B!)uS#
* @since 2006-2-2 WaYT7 :
* @version 1.0 COk;z.Kn
*/ 1Ydym2
public class HeapSort implements SortUtil.Sort{ [<p7'n3x
O+Qt8,
/* (non-Javadoc) ts3BmfR?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Km9Y_`?
*/ yYM_
public void sort(int[] data) { XF 8$D
MaxHeap h=new MaxHeap(); YFY$iN~B,
h.init(data); ({_Dg43O'[
for(int i=0;i h.remove(); ?E:L6,a
System.arraycopy(h.queue,1,data,0,data.length); 98AX=%8
} ^%pM$3ov
&?mJL0fy
private static class MaxHeap{ L#^'9v}Hb
L+o"<LV]
void init(int[] data){ `$odxo+
this.queue=new int[data.length+1]; G 0;5I_D/
for(int i=0;i queue[++size]=data; :RE.md
fixUp(size); Ysz&/ry
} ApxGrCu
} lYq4f|5H}m
R<jt$--H
private int size=0; }+4^ZbX+:
g1s\6%g
private int[] queue; Eax^1 |6
b7_uT`<
public int get() { ToWtltCD
return queue[1]; $<(FZb=
} Zw`vPvb!
;>duY\$<
public void remove() { !$i*u-%4
SortUtil.swap(queue,1,size--); &58+-jzW
fixDown(1); xF4>G0
} lSzLR~=Au
file://fixdown `Z:5E
private void fixDown(int k) { v9qgfdBS5
int j; @GpM4>:
while ((j = k << 1) <= size) { 0[qU k(=}[
if (j < size %26amp;%26amp; queue[j] j++; s;'jn_,0
if (queue[k]>queue[j]) file://不用交换 |_^A$Hv
break; I*Q^$YnM
SortUtil.swap(queue,j,k); N5%zbfKM
k = j; 9j;L-
} ~;*SW[4
} SXW8p>1Jw
private void fixUp(int k) { (!@ Q\P
while (k > 1) { mu?6Phj
int j = k >> 1; t<|S7EqIL
if (queue[j]>queue[k]) &(]@L\A
break; 1dy>a=W
SortUtil.swap(queue,j,k); z!r-g(^G
k = j; g5 J[ut
} z"@yE*6
} 9svnB@
y.l`NTT]<
} [8o!X)
t)*MLg<C
} R\B-cU[,
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SortUtil： lStYfO:<'v
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package org.rut.util.algorithm; :q xd])-
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import org.rut.util.algorithm.support.BubbleSort; w,t>M_(N
import org.rut.util.algorithm.support.HeapSort; =&J7 'nDP
import org.rut.util.algorithm.support.ImprovedMergeSort; Gqz<;y
import org.rut.util.algorithm.support.ImprovedQuickSort; ;gC.fpu
import org.rut.util.algorithm.support.InsertSort; #=G[~m\
import org.rut.util.algorithm.support.MergeSort; .UUY9@
import org.rut.util.algorithm.support.QuickSort; $~[k?D
import org.rut.util.algorithm.support.SelectionSort; Ie[8Iot?bn
import org.rut.util.algorithm.support.ShellSort; tCJ+OU5/
4\.1phe$a
/** 4nfpPNt
* @author treeroot d&dp#)._8
* @since 2006-2-2 &3Q!'pJJ
* @version 1.0 Z*}5M4
*/ rl0sN5n
public class SortUtil { ~e,D`Lv
public final static int INSERT = 1; i9qn_/<c
public final static int BUBBLE = 2; =-r[ s%t&
public final static int SELECTION = 3; yH'vhtop
public final static int SHELL = 4; *h`%u8/{
public final static int QUICK = 5; {p{TG5rwX
public final static int IMPROVED_QUICK = 6; G8y:f%I!b
public final static int MERGE = 7; YR2Q6}xR
public final static int IMPROVED_MERGE = 8; J5Nz<
public final static int HEAP = 9; S+d@RMdes
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public static void sort(int[] data) { hpxqL%r
sort(data, IMPROVED_QUICK); aP%2CP~_P
} =Mb1)^m
private static String[] name={ bvf}r ,`Q7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )jh4HMvmC
}; &:i|;^^2
"gcHcboU5$
private static Sort[] impl=new Sort[]{ S+mZ.aFS0z
new InsertSort(), ~i4h.ZLj
new BubbleSort(), _k0X)N+li
new SelectionSort(), q"|,HpQ
new ShellSort(), \a|FhhI
new QuickSort(), P,2FH2Eyj
new ImprovedQuickSort(), Hqel1J
new MergeSort(), ;^q@w
new ImprovedMergeSort(), *nv%~t
new HeapSort() !ys82
}; 4xg7oo0iJ
/.'tfy$
public static String toString(int algorithm){ s<i& q {r
return name[algorithm-1]; BM(8+Wj
} ;^9Ao>(?y
9!u=q5+E
public static void sort(int[] data, int algorithm) { wF +9Iu
impl[algorithm-1].sort(data); tFY;q##z
} >IL[eiiPG
,X[lC\1a
public static interface Sort { Z'P>sV
public void sort(int[] data); {&2aH>V/
} Q-3o k7
h}X^
public static void swap(int[] data, int i, int j) { ? 1OZEzA!
int temp = data; {9tKq--@E9
data = data[j]; 2;Ij~~
data[j] = temp; 2VrO8q(
} J33enQd
} Xndgs}zz