[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; &LCUoTzj
} 2 ||KP|5@
int i1=l; %f_)<NP9=
int i2=mid+1; !~Hafn-1
for(int cur=l;cur<=r;cur++){ (hhdbf
if(i1==mid+1) 5@w'_#!)
data[cur]=temp[i2++]; BxSk%$J
else if(i2>r) xm<5S;E5U4
data[cur]=temp[i1++]; "-0pz\a
else if(temp[i1] data[cur]=temp[i1++]; vR6^n~
else pl jV|.?
data[cur]=temp[i2++]; ]ro1{wm!WU
} *eJhd w*
} A^T~@AO
SX_kr^#
} "sX[p
+t7c&td\
改进后的归并排序: n.Ur-ot
'U|MM;(
package org.rut.util.algorithm.support; D{,[\^c
*@\?}cX
import org.rut.util.algorithm.SortUtil; J9b?}-O)
Z-? Iip{
/** o*O"\/pmF
* @author treeroot OH-~
* @since 2006-2-2 ~>Hnf_pZO
* @version 1.0 1+16i=BF)
*/ N=O+X~
public class ImprovedMergeSort implements SortUtil.Sort { [[*0MA2Y
)rs|=M=Xk
private static final int THRESHOLD = 10; dVj'
;JPbBwm
/* Vz7w{HY
* (non-Javadoc) =`7#^7Q9
* g6[/F-3Qlf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9a"Y,1
*/ 0I(GB;E
public void sort(int[] data) { oP|pOs\$p
int[] temp=new int[data.length]; -7Aw s)
mergeSort(data,temp,0,data.length-1); 4y]:Gqz~
} 'b=eC
Pv{,aV\I}
private void mergeSort(int[] data, int[] temp, int l, int r) { Z?.p%*>`T=
int i, j, k; *6sJ*lh
int mid = (l + r) / 2; ch)Ps2i
if (l == r) Qq;m"M/
return; :oon}_MdRd
if ((mid - l) >= THRESHOLD) M0;t%*1
mergeSort(data, temp, l, mid); K=!ZI/+ju
else 2-cU -i4
insertSort(data, l, mid - l + 1); 8ACYuN\
if ((r - mid) > THRESHOLD) HdY3DdC%q
mergeSort(data, temp, mid + 1, r); !SO$k%b}!
else j &0fC!k
insertSort(data, mid + 1, r - mid); =E"kv!e
|`q)/ 08b
for (i = l; i <= mid; i++) { Ul$X%
temp = data; =}%#$
} pb/{ss+
for (j = 1; j <= r - mid; j++) { ZVL-o<6
temp[r - j + 1] = data[j + mid]; 0w'y#U)&8
} }0Kqy;
int a = temp[l]; },n,P&M\`
int b = temp[r]; ard3yNQt
for (i = l, j = r, k = l; k <= r; k++) { 'n>3`1E,
if (a < b) { J1c&"Oh
data[k] = temp[i++]; {P<BJ52=
a = temp; Vav+$l|j@
} else { :ET3&J L
data[k] = temp[j--]; MoKXl?B<
b = temp[j]; |;Se$AdT#
} )]>i>
} o$HJg
} |`94Wj<
v'bd.eqw
/** Sf4h!ly
* @param data ) v[Knp'
* @param l {>UMw>T[
* @param i '^-4{Y^2E
*/ RBK>Lws6
private void insertSort(int[] data, int start, int len) { cDQw`ORP*g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G0 nH Z6
} LDi ezi
} o+X'(!Trw
} >QZt)<[
} OB*Xb*HN
iRj x];:Vu
堆排序： d4/`:?w
~Q$c!=
package org.rut.util.algorithm.support; @k:f}-t
N?mY|x\}wK
import org.rut.util.algorithm.SortUtil; pRxlvVt
1n"+~N^\
/** .2{C29g
* @author treeroot V=l Q}sBY
* @since 2006-2-2 Lm*LJ_+ B
* @version 1.0 53u.pc
*/ kq1M<lk
public class HeapSort implements SortUtil.Sort{ |q!2i
Ti@P4:q
/* (non-Javadoc) )q]j?Z.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jKCqH$
*/ a9@l8{)RX
public void sort(int[] data) { ".Deu|>
MaxHeap h=new MaxHeap(); ^?^|Y?f2P?
h.init(data); I^(o3B
for(int i=0;i h.remove(); J\dhi{0
System.arraycopy(h.queue,1,data,0,data.length); 4G;`KqR@
} dS;|Kl[Om
c9g\7L,Z
private static class MaxHeap{ MBYD,v&
">D(+ xr!)
void init(int[] data){ |Qt`p@W
this.queue=new int[data.length+1]; O'& \-j 1
for(int i=0;i queue[++size]=data; pqQdr-aR=
fixUp(size); <>*''^
} l&^[cR
} _7j/[
4Utx 9^
private int size=0; #;*ai\6>vD
A^Hp#b@
private int[] queue; ry'^1~,
&A5[C{x
public int get() { Jn:GA@[I
return queue[1]; a+a%}76N
} >A'!T'"~
m1$P3tZPn
public void remove() { VzYP:QRz
SortUtil.swap(queue,1,size--); ,YMdXYu`s
fixDown(1); k#=leu"I
} u,SX`6%
file://fixdown yA>p[F
private void fixDown(int k) { = cI\OsV&?
int j; Y`O}]*{>8R
while ((j = k << 1) <= size) { Y)j,(9
if (j < size %26amp;%26amp; queue[j] j++; 5$"[gdt)T
if (queue[k]>queue[j]) file://不用交换 ={i&F
break; +$mskj0s
SortUtil.swap(queue,j,k); HG3>RcB
k = j; qP^0($
} by y1MgQd
} sImxa`kb
private void fixUp(int k) { J0WXH/:
while (k > 1) { K?OX
int j = k >> 1; C^42=?
if (queue[j]>queue[k]) /h.3<HI."*
break; VX>t!JP p
SortUtil.swap(queue,j,k); Z%n.:I<%ZV
k = j; D>x'3WYR
} LYq2A,wm$
} (PrPH/$
<ZvPtW
} BLH3$*,H
,l?76g
} Dp6"I!L<|
5~R{,]52
SortUtil： S| -{wC%
w>q_8V_K
package org.rut.util.algorithm; ]aW.b_7<9
[MXXY
import org.rut.util.algorithm.support.BubbleSort; w*ktx{
import org.rut.util.algorithm.support.HeapSort; &fy8,}
import org.rut.util.algorithm.support.ImprovedMergeSort; x2&!PpM
import org.rut.util.algorithm.support.ImprovedQuickSort; xY'YbHFz
import org.rut.util.algorithm.support.InsertSort; leYmVFE
import org.rut.util.algorithm.support.MergeSort; nT.2jk+
import org.rut.util.algorithm.support.QuickSort; 'nDT.i
import org.rut.util.algorithm.support.SelectionSort; I/-w65J]
import org.rut.util.algorithm.support.ShellSort; CY).I`aJ
r`g;k&"a
/** gGdYh.K&e5
* @author treeroot Z!i'Tbfn
* @since 2006-2-2 wkpVX*DfRE
* @version 1.0 Mc3h R0
*/ *U^I`j[u
public class SortUtil { d\Z4?@T<5
public final static int INSERT = 1; lRK?%~
public final static int BUBBLE = 2; sF3 l##Wv
public final static int SELECTION = 3; Cwa0!y5%
public final static int SHELL = 4; i@j ?<
public final static int QUICK = 5; <:7e4#
public final static int IMPROVED_QUICK = 6; ;3}b&Z[N]
public final static int MERGE = 7; d@4=XSj
public final static int IMPROVED_MERGE = 8; Fl>j5[kLZ
public final static int HEAP = 9; ,F9wc<V8
qq%_ksQ
public static void sort(int[] data) { ^[z\KmUqt
sort(data, IMPROVED_QUICK); )3\rp$]1
} ZU@jtqq
private static String[] name={ ~9;mZi1-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *7V{yK$O|
}; {Om3fSk:
G8-d%O p
private static Sort[] impl=new Sort[]{ %LlKi5u]
new InsertSort(), E :gArQ
new BubbleSort(), ;RZa<2
new SelectionSort(), ^a5~FI:
new ShellSort(), 4GejT(U
new QuickSort(), 4i&!V9@:
new ImprovedQuickSort(), pR7G/]U$A
new MergeSort(), ct/THq
new ImprovedMergeSort(), Z$K%@q,10+
new HeapSort() "Ksd9,J\b
}; !m5\w>
`CouP-g.
public static String toString(int algorithm){ .z7f_KX^
return name[algorithm-1]; pnb$lpxt
} FsZEB/c
sh3}0u+
public static void sort(int[] data, int algorithm) { Ec/+9H6g
impl[algorithm-1].sort(data); 2p.+C35c=j
} -;.fU44O[#
>'g60R[
public static interface Sort { ky"7 ^
public void sort(int[] data); fb=vO U
} d-&dA_?
o%Q'<0d
public static void swap(int[] data, int i, int j) { cwU6}*_zn
int temp = data; p)]^>-L
data = data[j]; uV\#J{'*
data[j] = temp; 3VgH*vAU}
} I`lH6hHp
} ~%q e,