[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; z<h?WsL
} [i 7^a/e
int i1=l; KO''B or
int i2=mid+1; J}M_Ka
for(int cur=l;cur<=r;cur++){ G-#]|)
if(i1==mid+1) 2]i>kV/,0
data[cur]=temp[i2++]; :u4q.^&!e
else if(i2>r) a"Q>K7K
data[cur]=temp[i1++]; ~;ZT<eCIA
else if(temp[i1] data[cur]=temp[i1++]; D$&LCW#x
else Lo-\;%y
data[cur]=temp[i2++]; >x0)
} ^W)h=49PN
} "u=U@1 ^
3~5%6`
} ]\ DIJ>JZ
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改进后的归并排序: NBaXfWh
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package org.rut.util.algorithm.support; Ao}J
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import org.rut.util.algorithm.SortUtil; 7~H.\4HB
6:$+"@ps
/** PS\n0
* @author treeroot 8Vf]K}d
* @since 2006-2-2 0[QVU,]<
* @version 1.0 "eOFp\vPr
*/ k'b'Ay(<
public class ImprovedMergeSort implements SortUtil.Sort { TLWU7aj&!
IJzPWs5W:
private static final int THRESHOLD = 10; 3H_%2V6#V1
</@3}rfUPg
/* 78n`VmH~L
* (non-Javadoc) '|~L9t
* YVT\@+C'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %!HBPLk
*/ 4Y!_tZ>
public void sort(int[] data) { ;G\RGU~
int[] temp=new int[data.length]; -NuRf#
mergeSort(data,temp,0,data.length-1); #qPWJ
} z($h7TZ$
s^6"qhTa
private void mergeSort(int[] data, int[] temp, int l, int r) { ?loP18S b
int i, j, k; gT8%?U:
int mid = (l + r) / 2; Q/u1$&1
if (l == r) Bq 9Eu1
return; m:4Ec>?e
if ((mid - l) >= THRESHOLD) c*:H6(u
mergeSort(data, temp, l, mid); ?jy6%Y#,i
else S(MVL!Lm
insertSort(data, l, mid - l + 1); DuzJQSv
if ((r - mid) > THRESHOLD) ~P5;k_&
mergeSort(data, temp, mid + 1, r); aNxq_pRb
else 5uxB)Dx)
insertSort(data, mid + 1, r - mid); WAWy3i
9X%H$>s
for (i = l; i <= mid; i++) { BH+@!H3hf
temp = data; d=~-8]%\
} qS.TVNZ
for (j = 1; j <= r - mid; j++) { /%4wm?(eA
temp[r - j + 1] = data[j + mid]; P9/Bc^5'
} WVa#nU^
int a = temp[l]; |?=a84n1l
int b = temp[r]; -o`Eka!ELz
for (i = l, j = r, k = l; k <= r; k++) { +^0Q~>=VD
if (a < b) { T|fmO<e*n
data[k] = temp[i++]; Utv#E.VI
a = temp; [>^xMF]$2
} else { %n7Y5|Uh
data[k] = temp[j--]; 3LK]VuZE
b = temp[j]; oMNgyAp^
} g4"0:^/
} |)'6U3
} =}h8Cl{H/
Q3OGU}F
/** w,/&oe5M+
* @param data F4T}HY>nZ
* @param l EqB3f_
* @param i =iZj&B X
*/ F[HMX4
private void insertSort(int[] data, int start, int len) { h'D-e5i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n>|7 k3
} WBIJ9e2~
} OwJZ?j&)
} miCW(mbO8
} `~ ,
tn@MOOPl
堆排序： ^qgOgu
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package org.rut.util.algorithm.support; ud}B#{6
!rwe|"8m?u
import org.rut.util.algorithm.SortUtil; &y~EEh|
C~PoC'"q
/** <ic%c/mN
* @author treeroot h9J%NH
* @since 2006-2-2 V/; / &
* @version 1.0 h%0hryGB
*/ pl.D h
public class HeapSort implements SortUtil.Sort{ cI g|sn
gOnVN6
/* (non-Javadoc) e.<y-b?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N4z(2.
*/ 3$E\B=7/U
public void sort(int[] data) { _0uFe7sIZ
MaxHeap h=new MaxHeap(); IW1+^F9NEw
h.init(data); iCK p"(kf
for(int i=0;i h.remove(); c(tX761qz
System.arraycopy(h.queue,1,data,0,data.length); B"9/+Yj
} K.{:H4_
fQtV-\Bc
private static class MaxHeap{ S9'8rn!_
k- ?:0
void init(int[] data){ uk\-"dS
this.queue=new int[data.length+1]; Ba]J3Yp,z
for(int i=0;i queue[++size]=data; fNkN
fixUp(size); j!oD9&W4~
} G{8>
} 6)QJms
'W>Zr}:
private int size=0; p?q~.YY
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private int[] queue; [`u3SN/P
^{vf|zZ _
public int get() { /<\B8^yQ
return queue[1]; tCw.wDq3=
} 6N^sUc0s
>>'t7U##
public void remove() { $G_,$U!
SortUtil.swap(queue,1,size--); N0:gY]o%
fixDown(1); B<`'h
} e{8j(` (;#
file://fixdown 9w%|Nk>=>
private void fixDown(int k) { X9d~r_2&m<
int j; /61P`1y(J
while ((j = k << 1) <= size) { ~MOab e
if (j < size %26amp;%26amp; queue[j] j++; rTR4j>Ua~
if (queue[k]>queue[j]) file://不用交换 Ai 9UB=[R
break; 6jGPmOM/
SortUtil.swap(queue,j,k); U6R"eQUTV
k = j; vXio /m
} 6axDuwQ
} Ckelr
private void fixUp(int k) { 7i,Z c]
while (k > 1) { kCq]#e~wq
int j = k >> 1; &vy/Vd
if (queue[j]>queue[k]) )Apg
break; "HuV'
SortUtil.swap(queue,j,k); !E0zj9 [ R
k = j; -}h+hS50F
} vw'`t6
} ?-"%%#
n$ri:~s
} (($"XOU
|#r[{2sS
} 8, >YB+Hb
z&"-%l.b@}
SortUtil： u)DhkF|
#\Q{?F!4
package org.rut.util.algorithm; 1b6ox6
~m]sJpW<"
import org.rut.util.algorithm.support.BubbleSort; E27N1J+1
import org.rut.util.algorithm.support.HeapSort; ;U +;NsCH
import org.rut.util.algorithm.support.ImprovedMergeSort; q66+x)
import org.rut.util.algorithm.support.ImprovedQuickSort; LOD'iiH6
import org.rut.util.algorithm.support.InsertSort; kg>Ymo.
import org.rut.util.algorithm.support.MergeSort; | Q Y_ci
import org.rut.util.algorithm.support.QuickSort; 3Mnm2*\
import org.rut.util.algorithm.support.SelectionSort; k#4%d1O}
import org.rut.util.algorithm.support.ShellSort; q*<Fy4j
>UP{=`
/** (ei;Y~i
* @author treeroot Ew4>+o!
* @since 2006-2-2 31w9$H N
* @version 1.0 NW.<v /?=,
*/ cR0RJ$[d
public class SortUtil { S_z}h
public final static int INSERT = 1; UeG$lMV
public final static int BUBBLE = 2; SX{shM2
public final static int SELECTION = 3; yMQuM:d
public final static int SHELL = 4; H?dmNwkPY
public final static int QUICK = 5; PgKA>50a
public final static int IMPROVED_QUICK = 6; iXN7+QO)
public final static int MERGE = 7; [w%MECTe
public final static int IMPROVED_MERGE = 8; 8-N8v *0
public final static int HEAP = 9; nt/+?Sj
> n~l\ fC
public static void sort(int[] data) { e7{n=M
sort(data, IMPROVED_QUICK); =sqhPS<>
} iK*2 Z$`lw
private static String[] name={ v;E7UL .w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )C @W_cfMN
}; }),tk?\
AxaabS$\
private static Sort[] impl=new Sort[]{ Pez 7HKW:
new InsertSort(), Xwg|fr+p
new BubbleSort(), FkdG@7Xf
new SelectionSort(), @quNVx(y
new ShellSort(), 58H[sM4>
new QuickSort(), ^y?7B_%:B#
new ImprovedQuickSort(), vrtK~5K
new MergeSort(), %$b)l?!
new ImprovedMergeSort(), "t<${
new HeapSort() @j%r6N
}; \dyJ=tg
_Ee`Uk
public static String toString(int algorithm){ {gE19J3
return name[algorithm-1]; ` Nn^
} kIAWI;H{
rh*Pl]'3z
public static void sort(int[] data, int algorithm) { Md \yXp
impl[algorithm-1].sort(data); `U4R% qhWA
} Bi"7FF(z
tylMJ$ 9*.
public static interface Sort { x%ZgLvdp,
public void sort(int[] data); qll)
} ,3G8afo
EDR;" G(N
public static void swap(int[] data, int i, int j) { ta>:iQa
int temp = data; v;S7i>\
data = data[j]; (+<SR5,/3
data[j] = temp; |Ire#0Nwx
} Do7&OBI~
} <RmI)g>'_^