[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; W ~f(::
} H<EQu|f&x
int i1=l; k%]=!5F
int i2=mid+1; GL{57
for(int cur=l;cur<=r;cur++){ /3B $(
if(i1==mid+1) re?s.djT
data[cur]=temp[i2++]; ~{,X3-S_H
else if(i2>r) 6/V3.UP-
data[cur]=temp[i1++]; y:m_tv0~0
else if(temp[i1] data[cur]=temp[i1++]; e]=lKxFh&l
else a^d8I
data[cur]=temp[i2++]; :j }fC8'
} zOgTQs"ZH
} 03E4cYxt5
4k-+?L!/G
} YjOs}TD lx
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改进后的归并排序: 29CINC
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package org.rut.util.algorithm.support; 2owEw*5jl/
K"j_>63)
import org.rut.util.algorithm.SortUtil; VA*y|Q6
sm[94,26
/** 'R`tLN
* @author treeroot z4M9M7)"
* @since 2006-2-2 ?;/^Ya1;Z
* @version 1.0 $Iv2j">3)
*/ W"^wnGa@a
public class ImprovedMergeSort implements SortUtil.Sort { a<}#HfC;'
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private static final int THRESHOLD = 10; Mj[f~
JRCrZW}
/* <S?ddp2
* (non-Javadoc) < -W*$?^
* MUfG?r\t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q'_z<V
*/ `\Hf]b
public void sort(int[] data) { A+hT3;lp
int[] temp=new int[data.length]; (jU6GJRP
mergeSort(data,temp,0,data.length-1); 0cK{
} E|'h]NY
J+d1&Tw&
private void mergeSort(int[] data, int[] temp, int l, int r) { =] *.ZH#h
int i, j, k; mU}F!J#6
int mid = (l + r) / 2; 4jD2FFG- G
if (l == r) {43>m)8+
return; Y%`xDI
if ((mid - l) >= THRESHOLD) b[V^86X^
mergeSort(data, temp, l, mid); A\8}|r(>9E
else K2%w0ohC
insertSort(data, l, mid - l + 1); ,^#yo6-
if ((r - mid) > THRESHOLD) KM^ufF2[
mergeSort(data, temp, mid + 1, r); y~()|L[
else ")=X4]D
insertSort(data, mid + 1, r - mid); P#=`2a#G
8 r_>t2$
for (i = l; i <= mid; i++) { Aq3}Ng
temp = data; 8Q_SRwN
} >jD[X5Y
for (j = 1; j <= r - mid; j++) { 4Y[1aQ(%
temp[r - j + 1] = data[j + mid]; Y>'|oygHA
} cM&{+el
int a = temp[l]; E[Cb|E
int b = temp[r]; yX~v-N!X
for (i = l, j = r, k = l; k <= r; k++) { s%<eD
if (a < b) { [l,Ei?
data[k] = temp[i++]; 3}e%[AKh
a = temp; ^o7;c[E`
} else { M)SEn/T-
data[k] = temp[j--]; 8#vc(04(
b = temp[j]; / X1 x
} _a1x\,R|DB
} )"pF R4
} uu`G 2[t
S~|T4q(
/** @')[FEdW
* @param data KEWTBBg
* @param l >,td(= :
* @param i hdrm!aBd
*/ hP15qKy
private void insertSort(int[] data, int start, int len) { W*2U="t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |P%Jw,}]9
} }sxYxn~
} thhwN A
} Dc,I7F|%
} ~ 0M'7q'
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堆排序： %$b:X5$Z
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package org.rut.util.algorithm.support; <_7*67{
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import org.rut.util.algorithm.SortUtil; AJ=qna
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/** @ta7"6p-i@
* @author treeroot 13>0OKg`#
* @since 2006-2-2 UeRj< \"Q
* @version 1.0 D|{jR~J)xK
*/ HPZ}*m'
public class HeapSort implements SortUtil.Sort{ Ftr5k^!
')$+G152
/* (non-Javadoc) 4qk9NK2 U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9gmW&{6q
*/ !_Wi!Vr_
public void sort(int[] data) { B8}Nvz /
MaxHeap h=new MaxHeap(); Q637N|01
h.init(data); `7r@a
for(int i=0;i h.remove(); maNl^i
System.arraycopy(h.queue,1,data,0,data.length); 3qf Ym}d
} r[*Vqcz
<_-hRbS
private static class MaxHeap{ ~Yy>zUH^X
X"fb;sGT
void init(int[] data){ 5;YMqUkw
this.queue=new int[data.length+1]; Ck)*&
for(int i=0;i queue[++size]=data; H*r)Z90
fixUp(size); 4GX-ma,
} B\o Mn
} C)`Fv=]R
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private int size=0; MB~=f[cUnd
A|<jX}
private int[] queue; C@'h<[v`1v
N u<_}
public int get() { $adbCY\
return queue[1]; {y_98N
} )!P)U(*v
:qd`zG3
public void remove() { JPoN&BTCj
SortUtil.swap(queue,1,size--); ~=uWD&5B4
fixDown(1); ,Vt/(x-
} K/|Z$4S
file://fixdown x$6^R q>2
private void fixDown(int k) { vzim<;i
int j; E2Q[ZoVS
while ((j = k << 1) <= size) { !1$])VQWI
if (j < size %26amp;%26amp; queue[j] j++; 4b98KsYg
if (queue[k]>queue[j]) file://不用交换 )p<ExMIxd
break; ~?K~L~f5
SortUtil.swap(queue,j,k); 0.8 2kl
k = j; }&wUr>=
} &E.^jR~*
} ewctkI$,5
private void fixUp(int k) { +JjW_Rl?=V
while (k > 1) { s~5[![1 K
int j = k >> 1; x-^`~p
if (queue[j]>queue[k]) z=q3Zo
break; iO|se:LY<
SortUtil.swap(queue,j,k); _./Sk|C
k = j; v|dBSX9k0
} 6WXRP;!Q
} CxwoBuG=?
Nn!+,;ut
} W*Zkc:{eB
DH\0z[
} ~?dNd
#h` V>;
SortUtil： wl#@lOv-P
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package org.rut.util.algorithm; >0ow7Uw;
8%A#`)fb
import org.rut.util.algorithm.support.BubbleSort; '>-gi}z7
import org.rut.util.algorithm.support.HeapSort; I ?gSG*m
import org.rut.util.algorithm.support.ImprovedMergeSort; (nf~x
import org.rut.util.algorithm.support.ImprovedQuickSort; Z2qW\E^_r
import org.rut.util.algorithm.support.InsertSort; 0IBhb(X
import org.rut.util.algorithm.support.MergeSort; TQpfQ
import org.rut.util.algorithm.support.QuickSort; dfKF%27
import org.rut.util.algorithm.support.SelectionSort; ,!#*GZ.ix
import org.rut.util.algorithm.support.ShellSort; C~2F9Pg
haK3?A,"_A
/** n<O}hM ZT
* @author treeroot 2bw_IT
* @since 2006-2-2 !dyXJQ
* @version 1.0 <>y;.@}Q
*/ itBwCIjG
public class SortUtil { ON=@O
public final static int INSERT = 1; (^TF%(H
public final static int BUBBLE = 2; 5:Z0Pt
public final static int SELECTION = 3; ;z}i-cNae
public final static int SHELL = 4; B+\3-q
public final static int QUICK = 5; D~S<U
public final static int IMPROVED_QUICK = 6; ?!A7rb/tj
public final static int MERGE = 7; YIoQL}pX
public final static int IMPROVED_MERGE = 8; GpY"fc%
public final static int HEAP = 9; 6#7Lm) g8
m$}R%
public static void sort(int[] data) { KL1/^1
sort(data, IMPROVED_QUICK); \^L`7cBL
} 8 OY3A
private static String[] name={ ]zE;Tw.S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [^Os kJ4
}; Ugu[|,
#5cEV'm;
private static Sort[] impl=new Sort[]{ Cl;oi}L
new InsertSort(), Rdvk ml@@
new BubbleSort(), vQosPS_2L
new SelectionSort(), \?[v{WP)
new ShellSort(), 5na~@-9p
new QuickSort(), Uc7mOa}4
new ImprovedQuickSort(), S?1AFI9{
new MergeSort(), xST8|H
new ImprovedMergeSort(), 5D\f8L
new HeapSort() JjPKR?[>
}; PF)jdcX
K1mPr^3rC
public static String toString(int algorithm){ *"?l]d
return name[algorithm-1]; K28+]qy[
} ALrw\qV
}\tdcTMgS
public static void sort(int[] data, int algorithm) { +T|JK7
impl[algorithm-1].sort(data); [ey:e6,T9
} |'P]GK
SQBa;hvgM
public static interface Sort { &]"
public void sort(int[] data); ")O%86_Q:
} 7X0Lq}G@
%HGD;_bhI
public static void swap(int[] data, int i, int j) { =XA;[PVx:#
int temp = data; UW N*j_9i
data = data[j]; PDJr<E?
data[j] = temp; E7t+E)=8
} 7!@-*/|!S9
} QLXN*c