[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; PWG;&ma
} 7LdzZS0OM
int i1=l; fTgbF{?xh
int i2=mid+1; 3+zzi
for(int cur=l;cur<=r;cur++){ `^%@b SE(
if(i1==mid+1) Tk](eQsy.v
data[cur]=temp[i2++]; PUKVn+h
else if(i2>r) A:)sg!Lt
data[cur]=temp[i1++]; Z@oKz:U
else if(temp[i1] data[cur]=temp[i1++]; BA*&N>a
else z Lw(@&
data[cur]=temp[i2++]; 8!4[#y<
} u\3ZIb
} pN+I]NgQ
>~wu3q
} -( Kh.h
KBj@V6Q
改进后的归并排序: ~'{VaYk]v
|*1xrM:v~
package org.rut.util.algorithm.support; r\RFDj
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import org.rut.util.algorithm.SortUtil; Om6Mmoqh
niAZ$w
/** 5p{25N_t
* @author treeroot #G~wE*VR$
* @since 2006-2-2 C*Xik9n
* @version 1.0 vX 1W@s
*/ 9tAE#A
public class ImprovedMergeSort implements SortUtil.Sort { B!iFmkCy
FE}s#n_Pd
private static final int THRESHOLD = 10; kwc*is
23k)X"5
/* oN ;-M-(
* (non-Javadoc) pU@YiwP"]x
* IywiCMjH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V8T#NJ
*/ S*s:4uf
public void sort(int[] data) { J@gm@ jLc
int[] temp=new int[data.length]; K4Y'B o4
mergeSort(data,temp,0,data.length-1); Z*Zc]hD
} 0<3E
+K&?)?/=
private void mergeSort(int[] data, int[] temp, int l, int r) { *?p ^6vO
int i, j, k; [9J:bD
int mid = (l + r) / 2; r;'i<t{P
if (l == r) sX!3_'-
return; Wt"ww~h`(
if ((mid - l) >= THRESHOLD) }pKv.
mergeSort(data, temp, l, mid); Q!`)e@r
else iel-<(~
insertSort(data, l, mid - l + 1); 6N?#b66
if ((r - mid) > THRESHOLD) 0W_mCV
mergeSort(data, temp, mid + 1, r); X*)?LxTj
else '9"%@AFxZ
insertSort(data, mid + 1, r - mid); V07VwVD
T:6K?$y?
for (i = l; i <= mid; i++) { `ReGnT[
temp = data; 9p4%8WhJ
} OelU D/[$
for (j = 1; j <= r - mid; j++) { G"{4'LlA
temp[r - j + 1] = data[j + mid]; \Vz,wy%-
} !"`Jqs
int a = temp[l]; S7Znz@
int b = temp[r]; blUY.{NN3
for (i = l, j = r, k = l; k <= r; k++) { l\_x(BH
if (a < b) { m^'~&!ba
data[k] = temp[i++]; :q(D(mK
a = temp; B_!wutV@
} else { 'OG{*TDPu
data[k] = temp[j--]; JBvk)ogM
b = temp[j]; >T`zh^+5W
} ygMd$0:MN
} "~_$T@^k>
} */4tJG1U
"cNg:
/** Q*Y4m8wY
* @param data K[*h+YO
* @param l ,}u,)7
* @param i i},d[
*/ C0gfJ~M)
private void insertSort(int[] data, int start, int len) { ^u3*hl}YKy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qg[heND
} b$dBV}0 L
} 8>ESD}(
} xC'mPcU8
} q)vK`\Y
::v;)VdX+*
堆排序： Z>X9J(=
uW ) \,
package org.rut.util.algorithm.support; v: giZxR
U7jhV,gO4
import org.rut.util.algorithm.SortUtil; kp'b>&9r
J9NsHr:A[
/** 'J2ewW5
* @author treeroot o1Ne+Jt
* @since 2006-2-2 =[s8q2V
* @version 1.0 ix:2Z-
*/ 33*^($bE&
public class HeapSort implements SortUtil.Sort{ XMomFW_@
KuIkul9^%
/* (non-Javadoc) d8rBu jT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h>~jQ&\M
*/ Fs?( UM
public void sort(int[] data) { nT_*EC<.
MaxHeap h=new MaxHeap(); EK^JLvyT
h.init(data); s;anP0-O
for(int i=0;i h.remove(); O5ucI$s
System.arraycopy(h.queue,1,data,0,data.length); u$apH{
} %B[YtWqm`/
Tc9&mKVE%(
private static class MaxHeap{ ,?Ok[G!cm
TFNUv<>X
void init(int[] data){ j[_t6Z
this.queue=new int[data.length+1]; +d.u##$
for(int i=0;i queue[++size]=data; _L8Mpx*E
fixUp(size); C(f$!~M4b
} _c[|@D
} 3xRM 1GgO
mp!YNI
private int size=0; 3Wjq>\
km9Gwg/zT
private int[] queue; SRP5P,-y
nWKO8C>
public int get() { "(Mvl1^BT
return queue[1]; hT.4t,wa8
} EV:_Kx8fP
Vp|2wlFE-
public void remove() { q sv+.aW
SortUtil.swap(queue,1,size--); @P*ylB}?Q
fixDown(1); Lc58lV=
} P;^y|0Nm
file://fixdown J>&[J!>r
private void fixDown(int k) { CR%D\I$o
int j; SL6mNn9c
while ((j = k << 1) <= size) { Xq+!eOT
if (j < size %26amp;%26amp; queue[j] j++; VEL:JsY
if (queue[k]>queue[j]) file://不用交换 FX{~"
break; " ]aQ Hh]f
SortUtil.swap(queue,j,k); =n> iQS
k = j; 3X,]=f@_
} vEu Ka<5
} xylpiSJ
private void fixUp(int k) { es.jh
while (k > 1) { E~'q?LJOB
int j = k >> 1; 1,m\Q_
if (queue[j]>queue[k]) kJHr&=VO~
break; VI(RT-S6
SortUtil.swap(queue,j,k); i6-wf Gs;
k = j; >L#];|
} aeEw#
} OG0r4^6Ly
7xX;MB&
} `Af{H/qiI
/p[|DJoM
} b{Z^)u2X
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SortUtil： *!._Ais,\
6XQ*:N/4al
package org.rut.util.algorithm; WAtg
%M|Z}2qv
import org.rut.util.algorithm.support.BubbleSort; b7?U8/#'
import org.rut.util.algorithm.support.HeapSort; p>2||
import org.rut.util.algorithm.support.ImprovedMergeSort; j)g_*\tQ
import org.rut.util.algorithm.support.ImprovedQuickSort; i58ZV`Rk`
import org.rut.util.algorithm.support.InsertSort; 5W*7qD[m
import org.rut.util.algorithm.support.MergeSort; O<}ep)mr
import org.rut.util.algorithm.support.QuickSort; \pjRv
import org.rut.util.algorithm.support.SelectionSort; Fg_?!zR>6
import org.rut.util.algorithm.support.ShellSort; K<$wz/\
It#hp,@e
/** !F=|*j
* @author treeroot `'z(--J}`
* @since 2006-2-2 \hjk$Gq
* @version 1.0 p:DL:^zx
*/ Y}AmX
public class SortUtil { ap Fs UsE
public final static int INSERT = 1; *ge].E
public final static int BUBBLE = 2; ^+(A&PyP?
public final static int SELECTION = 3; *>H M$.?Q
public final static int SHELL = 4; L9E;Uii0
public final static int QUICK = 5; P5'iYahCq_
public final static int IMPROVED_QUICK = 6; B'WCN&N
public final static int MERGE = 7; @5{.K/s
public final static int IMPROVED_MERGE = 8; b:N^Fe
public final static int HEAP = 9; Ha46U6_'h
J!21`M-Ue
public static void sort(int[] data) { i /O1vU#
sort(data, IMPROVED_QUICK); [W^6u7~
} o0,UXBx
private static String[] name={ -ET*M<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $=e&q
}; u=p ;A1oy
]_^"|RJ
private static Sort[] impl=new Sort[]{ \_m\U.*
new InsertSort(), .V5q$5j
new BubbleSort(), ib5;f0Qa
new SelectionSort(), :FX'[7;p
new ShellSort(), +-Z"H)
new QuickSort(), OaD Alrm
new ImprovedQuickSort(), #6Efev
new MergeSort(), _n-VgPRn
new ImprovedMergeSort(), 3q~":bpAp
new HeapSort() W0+gfg
}; 37j\D1Y
eT7!a']x
public static String toString(int algorithm){ ?z\q Mu
return name[algorithm-1]; F&W0DaH
} 21[K[ %
tnQR<
public static void sort(int[] data, int algorithm) { uM6CG0
impl[algorithm-1].sort(data); (PCimT=5
} 47)+'`
K;@RUy~
public static interface Sort { 9_M H
public void sort(int[] data); JcvHJ0X~a
} ]FY?_DGOA
^4xlZouCb
public static void swap(int[] data, int i, int j) { QLn5#x~xb
int temp = data; KuIt[oM
data = data[j]; e.)yV'%L
data[j] = temp; EIq{C-(
} Ze$^UR
} SQO>}#qm