[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; PSRGlxdO
} JOMZ&c^
int i1=l; zVIzrz0
int i2=mid+1; !`SR$dnE
for(int cur=l;cur<=r;cur++){ B7#;tCf
if(i1==mid+1) |c;S'36
data[cur]=temp[i2++]; L2 I/h`n"
else if(i2>r) 7Qo*u;fr
data[cur]=temp[i1++]; V#=N?p
else if(temp[i1] data[cur]=temp[i1++]; T/H*Bo*=5
else .m<-)Kx
data[cur]=temp[i2++]; BjA|H
} KT3[{lr
} xe5>)\18-
U}UIbJD*=
} ?f%@8%px
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改进后的归并排序: eN/Jb;W
n1H*][CK
package org.rut.util.algorithm.support; ^#G>P0mG%
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import org.rut.util.algorithm.SortUtil; L9x,G!
`q F:rQ
/** lU\|F5O@#
* @author treeroot qB8<(vBP+
* @since 2006-2-2 %hXa5}JL
* @version 1.0 a(m#GES
*/ w'UP#vT5&
public class ImprovedMergeSort implements SortUtil.Sort { YXmLd'F^3
f`?|A
private static final int THRESHOLD = 10; U8moVj8w1
`aCcTs7~]p
/* Q[}mH: w
* (non-Javadoc) =14pEe
* =~R0U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6ds&n#n
*/ V482V#BP
public void sort(int[] data) { jildiT[s
int[] temp=new int[data.length]; [9w8oNg0
mergeSort(data,temp,0,data.length-1); *`dGapd3
} [x@iqFO9
W] RxRdY6[
private void mergeSort(int[] data, int[] temp, int l, int r) { d@C93VYp
int i, j, k; L:~ "Vw6]_
int mid = (l + r) / 2; M,l Ib9
if (l == r) NWTsL OIm
return; #KiRH* giU
if ((mid - l) >= THRESHOLD) ^fRA$t
mergeSort(data, temp, l, mid); AR&u9Y)I
else ^.k}YSWut
insertSort(data, l, mid - l + 1); Jr#ptf"Wu
if ((r - mid) > THRESHOLD) 9X!OQxmg
mergeSort(data, temp, mid + 1, r); J H6\;G6
else P,,@&* :
insertSort(data, mid + 1, r - mid); d=q2Or
6Z7{|B5}Y
for (i = l; i <= mid; i++) { :g][99
temp = data; dD#A.C,Rz
} S]k<Ixvf
for (j = 1; j <= r - mid; j++) { ETYw
temp[r - j + 1] = data[j + mid]; J.~$^-&!
} N8:vn0ww
int a = temp[l]; Cfa?LgSz
int b = temp[r]; (d@lG*K
for (i = l, j = r, k = l; k <= r; k++) { hMi`n6m
if (a < b) { < =sO@0(<
data[k] = temp[i++]; >i=mw5`D]
a = temp; iQ:]1H s
} else { E{h
data[k] = temp[j--]; SeKU?\
b = temp[j]; Qb/qUUQO;0
} 5v8_ji#l[
} 9=Y-w s
} ~p^6
|R DPx6!V
/** <!R~G-D#_T
* @param data ,LX]
* @param l `9%@{Ryo
* @param i 7@5}WNr
*/ :,% vAI
private void insertSort(int[] data, int start, int len) { o[0Cv*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G-xW&wC-
} *e!0ZB3J
} Fep#Pw1
} vEk jd#
} DhYQ>Gv8U
*#w+*ywVZH
堆排序： LDx1@a|83
D!+d]A[r
package org.rut.util.algorithm.support; ymiOtA Z
*{/BPc0*
import org.rut.util.algorithm.SortUtil; cE$7CSR
tY~EB.%
/** TDq(%IW
* @author treeroot +QGZ2_vW
* @since 2006-2-2 7X*$Fu<
* @version 1.0 7='lu;=,
*/ IZoS2^:yw
public class HeapSort implements SortUtil.Sort{ q ^Un,h64t
8XIG<Nc
/* (non-Javadoc) Ko|nF-r_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9@/X;zO
*/ "AMbU68
public void sort(int[] data) { ;shhgz$
MaxHeap h=new MaxHeap(); 7j| ^ZuI+
h.init(data); F[RQ6PW
for(int i=0;i h.remove(); ).0klwfV
System.arraycopy(h.queue,1,data,0,data.length); L3/m}AH,
} 4i|yEf
T)?:q
private static class MaxHeap{ QH7"' u6
~-ZquJ-
void init(int[] data){ &c>%E%!"
this.queue=new int[data.length+1]; 3}~.#`QeY
for(int i=0;i queue[++size]=data; f9ux+XQk9
fixUp(size); ^h\& l{e
} Is57)(^.-
} .^ djt
'-c *S]:r
private int size=0; 4@19_+3
W>W b|W
private int[] queue; a4aM.o
S\5%nz\
public int get() { 5,dKha
return queue[1]; Bl[4[N
} 0+S ;0
>V1vw7Pa
public void remove() { orBB5JJ
SortUtil.swap(queue,1,size--); k6eh$*!
fixDown(1); # `L?24%
} P! cfe@;<4
file://fixdown %vn"tp
private void fixDown(int k) { YF8;s4
int j; a=_+8RyVQ
while ((j = k << 1) <= size) { ;Qn)~b~
if (j < size %26amp;%26amp; queue[j] j++; N$ oQK(
if (queue[k]>queue[j]) file://不用交换 {:;6 *W
break; VN3[B eH
SortUtil.swap(queue,j,k); GY`mF1b
k = j; pTeN[Yu?
} ) KvGJo)("
} A_8Xhem${
private void fixUp(int k) { m3#rU%Wj
while (k > 1) { 5]f6YlJZ
int j = k >> 1; wE~&Y?^
if (queue[j]>queue[k]) LO;7NK
break; Uv)B
SortUtil.swap(queue,j,k); @bRKJPU9)
k = j; h-.xx4D
} l"zwH
} 3QI.|;X
t1`.M$
} 1S+lHG92I
JIc(hRf9>
} O,PTY^
w%1-_;.aU6
SortUtil： I|x? K>
mV'-1
package org.rut.util.algorithm; NoOrQ m
O2qy[]km
import org.rut.util.algorithm.support.BubbleSort; -xXdT$Xd
import org.rut.util.algorithm.support.HeapSort; G)IK5zCDd
import org.rut.util.algorithm.support.ImprovedMergeSort; U3**x5F_
import org.rut.util.algorithm.support.ImprovedQuickSort; v?Zo5uVoq
import org.rut.util.algorithm.support.InsertSort; DuQW?9^232
import org.rut.util.algorithm.support.MergeSort; mWUkkR(/
import org.rut.util.algorithm.support.QuickSort; prEI9/d"
import org.rut.util.algorithm.support.SelectionSort; ;,lFocGv
import org.rut.util.algorithm.support.ShellSort; Y{d-k1?s5
D wfw|h
/** v#|yr<
* @author treeroot ?WP*At0
* @since 2006-2-2 ^ 0.`1$
* @version 1.0 xs6kr
*/ eC3 ~|G_O
public class SortUtil { 'iWDYZ?
public final static int INSERT = 1; b+`qGJrej
public final static int BUBBLE = 2; yGY:EvH^?
public final static int SELECTION = 3; %(1Jt"9|
public final static int SHELL = 4; f"z;'
public final static int QUICK = 5; T' =6_?7K4
public final static int IMPROVED_QUICK = 6; {TXfi'\
public final static int MERGE = 7; yUjkRT&h
public final static int IMPROVED_MERGE = 8; Xhs*nt%l
public final static int HEAP = 9; ,!O]c8PcU
4V&(w,zl
public static void sort(int[] data) { SM8f"H28
sort(data, IMPROVED_QUICK); F%f)oq`B
} RnSll-
private static String[] name={ p\P)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =w!2R QB
}; cd|/4L6
T65"?=<EB
private static Sort[] impl=new Sort[]{ LAFxeo
new InsertSort(), -^Qm_lN
new BubbleSort(), &+0?Xip{Z
new SelectionSort(), 8<x& Xd
new ShellSort(), R=<%!
new QuickSort(), 4,08`5{
new ImprovedQuickSort(), =9h!K:,k
new MergeSort(), 6 w'))Z
new ImprovedMergeSort(), klAvi%^jE
new HeapSort() '|<r[K
}; O!ilTMr
nDS\2
public static String toString(int algorithm){ OZ33w-X<
return name[algorithm-1]; ;F_P<b 2
} \.'[!GE*c
1Va=.#<
public static void sort(int[] data, int algorithm) { F9"Xu-g
impl[algorithm-1].sort(data); erKi*GssZ
} i&%m^p
+ 9I|Fm
public static interface Sort { Qz89=#W
public void sort(int[] data); ~Ajst!Y7=
} 3Vbt(K
h=qT@)h1>
public static void swap(int[] data, int i, int j) { u* G+=aV.6
int temp = data; FJ{/EloF
data = data[j]; &2Ef:RZF
data[j] = temp; wPX^P
} O^PN{u
} ;b(ww{&