[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; /%~`B[4F
} |b|p0Z%7{
int i1=l; U7O2.y+
int i2=mid+1; sf%=q$z
for(int cur=l;cur<=r;cur++){ 'Z';$N ]
if(i1==mid+1) Mb-C DPT
data[cur]=temp[i2++]; +K&ze:-Z
else if(i2>r) |(Sqd;#v
data[cur]=temp[i1++]; Mv_4*xVc
else if(temp[i1] data[cur]=temp[i1++]; 0&<{o!>k
else :iq1-Pw
data[cur]=temp[i2++]; aXwFQ,
} |>m@]s7Z
} V /|@
]F,5Oh :OY
} CpA=DnZ
nfd^'}$]
改进后的归并排序: Hc}(+wQN%
778a)ZOzb
package org.rut.util.algorithm.support; }V09tK/M
X)\t=><<
import org.rut.util.algorithm.SortUtil; *5wb8[
S#jE1EN
/** rN OwB2e
* @author treeroot =5+:<e,&
* @since 2006-2-2 M}HGFN
* @version 1.0 8I JFQDGA9
*/ N'IzHyo.
public class ImprovedMergeSort implements SortUtil.Sort { T<!TmG
u)%J5TR.Y
private static final int THRESHOLD = 10; By%aTuV$
V_h, UYN
/* yhZ2-*pTg
* (non-Javadoc) hD sFsG
* 6*CvRb&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s3oK[:/
*/ !s5 _JO
public void sort(int[] data) { znD0&CS9q
int[] temp=new int[data.length]; lBl`R|Gt
mergeSort(data,temp,0,data.length-1); .7{,u1N'
} k: D<Q
0&zp9(G5
private void mergeSort(int[] data, int[] temp, int l, int r) { ZjbMk3Y
int i, j, k; h%Bp%Y9
int mid = (l + r) / 2; Y'58.8hl
if (l == r) C&r&&Pw
return; p9fx~[_5/
if ((mid - l) >= THRESHOLD) nD|Bo 9
mergeSort(data, temp, l, mid); ?z p$Wz;k
else zoA]7pG-
insertSort(data, l, mid - l + 1); !Vy/-N
if ((r - mid) > THRESHOLD) 7N 7W0Ky
mergeSort(data, temp, mid + 1, r); L -<!,CASW
else ZxY%x/K
insertSort(data, mid + 1, r - mid); Ee^2stc-
XXvM*"3D5
for (i = l; i <= mid; i++) { 1ih|b8)Dn
temp = data; 7iT#dpF/A
} 0rooL<~fa
for (j = 1; j <= r - mid; j++) { _>0I9.[5
temp[r - j + 1] = data[j + mid]; KftZ^mk+p
} uK1DC i
int a = temp[l]; .*i.Z
int b = temp[r]; l.El3+
for (i = l, j = r, k = l; k <= r; k++) { Sw%^&*J
if (a < b) { /GqW1tcO
data[k] = temp[i++]; +uLl3(ml
a = temp; p{NVJ^!+
} else { VM88#^
data[k] = temp[j--]; -6@#Nq_iWU
b = temp[j]; \'x.DVp
} ;X*I,g.+H
} :.J Ad$>P
} =HH}E/9z
2XNO*zbve
/** h:[%' htz
* @param data /5pVzv+rm
* @param l wa2?%y_G
* @param i 7\HjQ7__
*/ :;HJ3V;
private void insertSort(int[] data, int start, int len) { t,Ss3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `B-jwVrN(
} oP!oU2eqK
} 16Cd0[h?
} N6EG!*
} }}G`yfs}r
c>mTd{Abi
堆排序： v4OroG=^
rvouE:
package org.rut.util.algorithm.support; E9<oA.
epXvk &
import org.rut.util.algorithm.SortUtil; 5L!EqB>m;
%=e^MN1
/** h&}z@
* @author treeroot 7wKT:~~oS3
* @since 2006-2-2 VN]70LFz*i
* @version 1.0 > &tmdE
*/ (.^KuXd
public class HeapSort implements SortUtil.Sort{ SI\ O>a9{
<5BNcl\ZL
/* (non-Javadoc) >>%m,F[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'A2^K5`3
*/ m?GBvL$
public void sort(int[] data) { NpI "XQ
MaxHeap h=new MaxHeap(); OXDEU.
h.init(data); /3#)
for(int i=0;i h.remove(); r^zra|]
System.arraycopy(h.queue,1,data,0,data.length); %1h%#/#[
} `8M{13fv
t.X8c/,;g
private static class MaxHeap{ +@G#Z3;l!
jJbS{1z
void init(int[] data){ D6N32q@
this.queue=new int[data.length+1]; P.#@1_:gC
for(int i=0;i queue[++size]=data; djmd @{Djt
fixUp(size); (_IPz)F
} Z@(m.&ZRx
} <!;NJLe`
r?7tI0
private int size=0; {?X:?M_
y8%QS*
private int[] queue; tK7v&[cI
wjy<{I
public int get() { ]Ub"NLYV
return queue[1]; grVPu! B;
} -RI&uFqOI
:yxP3e%rp
public void remove() { b,hRk1
SortUtil.swap(queue,1,size--); xlIVLv6dO
fixDown(1); yo^M>^P\N
} *jCHv
file://fixdown &a8%j+j
private void fixDown(int k) { zt!)7HBo
int j; tXfXuHa
while ((j = k << 1) <= size) { JIatRc?g
if (j < size %26amp;%26amp; queue[j] j++; !(A<
if (queue[k]>queue[j]) file://不用交换 gkhmQd
break; FeL!%z
SortUtil.swap(queue,j,k); ?uh%WN6nU]
k = j; =[do([A
} adY ,Nz
} %_(Xn
private void fixUp(int k) { ;.+C
while (k > 1) { ,Jrm85oG
int j = k >> 1; C[R|@9NI
if (queue[j]>queue[k]) )6b`1o!7
break; 0g'MFS
SortUtil.swap(queue,j,k); 6qR5A+|;
k = j; I+eKuWB
} pN=>q<]L
} bt=z6*C>A
yRy^'E~
} Uc<BLu;
\ORE;pG
} ^^z_[Ih
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SortUtil： j6GR-WQ]t
F]GX;<`
package org.rut.util.algorithm; Ve\.7s
sq_ yu(
import org.rut.util.algorithm.support.BubbleSort; eNDc220b
import org.rut.util.algorithm.support.HeapSort; "N3!!3
import org.rut.util.algorithm.support.ImprovedMergeSort; X?7s
import org.rut.util.algorithm.support.ImprovedQuickSort; Yij_'0vZ
import org.rut.util.algorithm.support.InsertSort; 3w&Z:<
import org.rut.util.algorithm.support.MergeSort; 6GMwB@ b
import org.rut.util.algorithm.support.QuickSort; s:xt4<
import org.rut.util.algorithm.support.SelectionSort; ^XT;n
import org.rut.util.algorithm.support.ShellSort; woUt*G@
NqC}}N\,
/** 8}aSSL]
* @author treeroot >@tJ7mM
* @since 2006-2-2 "G!,gtA~
* @version 1.0 7*eIs2aY
*/ :Qu.CvYF
public class SortUtil { oM!zeJNA
public final static int INSERT = 1; Bo4iX,zu
public final static int BUBBLE = 2; AzMX~cd
public final static int SELECTION = 3; .A F94OlE/
public final static int SHELL = 4; 09 vm5|
public final static int QUICK = 5; )O,+'w?
public final static int IMPROVED_QUICK = 6; "lA8CA
public final static int MERGE = 7; Zt \3y
public final static int IMPROVED_MERGE = 8; Y;=GM:*H
public final static int HEAP = 9; k $E{'Dv
kS62]v]
public static void sort(int[] data) { w""
sort(data, IMPROVED_QUICK); {!*dk V
} Ask~
private static String[] name={ >P}6/L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wb#ON|.2
}; Yb348kRF
/Py`a1
private static Sort[] impl=new Sort[]{ :M$8<03>F
new InsertSort(), EouI S2e;a
new BubbleSort(), }F-,PSH Ml
new SelectionSort(), TOsHb+Uv
new ShellSort(), ]RuH6d2d|
new QuickSort(), 8bX?HeYrr
new ImprovedQuickSort(), PEMuIYm$
new MergeSort(), T,uJO<
new ImprovedMergeSort(), V!f' O@p[
new HeapSort() COL_c<\
}; 42Cc`a%U
}LwKi-G?
public static String toString(int algorithm){ /Z2 g>
return name[algorithm-1]; snVeOe#'S
} es1'z.UJ
-+n?Q;
public static void sort(int[] data, int algorithm) { 7#sb},J{
impl[algorithm-1].sort(data); ^ux"<?
} OSkBBo]~z
\4|osZ0y
public static interface Sort { e0g>.P@6
public void sort(int[] data); 'ALe>\WO
} r5Xi2!
nXW]9zC"/
public static void swap(int[] data, int i, int j) { ^}4ysw
int temp = data; -^,wQW:o)
data = data[j]; 2+C8w%F8
data[j] = temp; y^:6D(SR
} W;T(q~XK
} +ooQ-Gh