[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; JH{/0x#+
} *1Bq>h:
int i1=l; Dm{Xd+Y
int i2=mid+1; f*<Vq:N=\
for(int cur=l;cur<=r;cur++){ {ibu0
if(i1==mid+1) g=[OH
data[cur]=temp[i2++]; rbnAC*y8'L
else if(i2>r) :P}3cl_
data[cur]=temp[i1++]; CDM6o!ur3
else if(temp[i1] data[cur]=temp[i1++]; kBhjqI*
else m=sEB8P
data[cur]=temp[i2++]; ?[d4HKs
} l>K+4
} &muBSQ-
[:{ FR2*x
} PkrVQH9^w
$/s"It
改进后的归并排序: |dLr #+'az
:-}K:ucaj
package org.rut.util.algorithm.support; /^AH/,p
O\.^H/
import org.rut.util.algorithm.SortUtil; zI4rAsysL
TL2E|@k1]
/** ?VNtT/
* @author treeroot RbL?(
* @since 2006-2-2 yf9"Rc~+
* @version 1.0 9 Gd6/2
*/ Cu8mNB{H
public class ImprovedMergeSort implements SortUtil.Sort { YK)m6zW5
uVUU1@
private static final int THRESHOLD = 10; a*y9@RC}
-y-}g[`
/* >O?WRCB
* (non-Javadoc) fgd2jr3T
* 04-_ K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EL`|>/[J
*/ [*^.$s(
public void sort(int[] data) { aO(PVS|P
int[] temp=new int[data.length]; ~D9Cu>d9
mergeSort(data,temp,0,data.length-1); \W.CHSD
} `.MZ,Xhqi"
t`z"=S
private void mergeSort(int[] data, int[] temp, int l, int r) { qR'FbI
int i, j, k; Uw("+[5O0
int mid = (l + r) / 2; -5b|nQuY
if (l == r) \Ip)Lm0
return; vW=-RTRH
if ((mid - l) >= THRESHOLD) p-}X=O$
mergeSort(data, temp, l, mid); {!|4JquE_
else eLSzGbKf
insertSort(data, l, mid - l + 1); _/LGGt4&%
if ((r - mid) > THRESHOLD) RxMsP;be
mergeSort(data, temp, mid + 1, r); `f>!/Zm%9
else J=^IS\m
insertSort(data, mid + 1, r - mid); 309 pl
b]]8Vs)'
for (i = l; i <= mid; i++) { pJ] Ix *M
temp = data; 0SL{J*S4[#
} 1Z}5ykM3
for (j = 1; j <= r - mid; j++) { :/T\E\Qr
temp[r - j + 1] = data[j + mid]; BTkx}KK
} vN{@c(=g
int a = temp[l]; EbILAJ
int b = temp[r]; C#U(POA
for (i = l, j = r, k = l; k <= r; k++) { zl1*GVg
if (a < b) { yiZtG#6K{
data[k] = temp[i++]; &'z_:Wm
a = temp; R])Eg&
} else { ,R[$S"]!SH
data[k] = temp[j--]; I`0-q?l
b = temp[j]; :oIBJ u%/
} `*8}q!.
} [ \_o_W
} OBAO(Ke
eq6O6-
/** 0#]fEi
* @param data MLWHO$C~T
* @param l }93kHO{
* @param i {fXkbMO|
*/ x4^nT=?6_
private void insertSort(int[] data, int start, int len) { [Fr](&Tx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XG/xMz~
} O@Aazc5K
} !J7`frv"(
} c|?(>
} B#V""[Y9
rt+4-WuK>
堆排序： K3!3[dR*
R0-0
package org.rut.util.algorithm.support; ;\RVC7
U?0|2hR~
import org.rut.util.algorithm.SortUtil; P~\rP6 ;
cI2Ps3~"Q
/** *O_fw 0jV
* @author treeroot 81Kf X {|
* @since 2006-2-2 uuY^Q;^I*
* @version 1.0 S8#0Vo$)a
*/ d1D f`
public class HeapSort implements SortUtil.Sort{ gQ\.|'%
q}@L"a`
/* (non-Javadoc) v?`R8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W>pe-
*/ eft=k}
public void sort(int[] data) { c-$rB_t+
MaxHeap h=new MaxHeap(); Xw4Eti._D
h.init(data); Orq/38:4G
for(int i=0;i h.remove(); X?_rD'3
System.arraycopy(h.queue,1,data,0,data.length); CPJ<A,V
} 1ubu~6
s 4`-mIa
private static class MaxHeap{ ^OY$ W
iE'_x$i
void init(int[] data){ ]KFh1
this.queue=new int[data.length+1]; /!Rva"
for(int i=0;i queue[++size]=data; 3WwS+6R
fixUp(size); Z[@ i/. I
} [piK"N
} a OmG,+o
1n`[D&?q
private int size=0; f+:iz'b#U
L2VwW
private int[] queue; :qo[@x{
Z 8w\[AF{$
public int get() { p\[!=ZXFr\
return queue[1]; (pELd(*Ga
} &;$uU
2*g2UP
public void remove() { gN/!w:
SortUtil.swap(queue,1,size--); 1|sem(t
fixDown(1); K28L(4)
} $oW=N
file://fixdown qJ;~ANwt
private void fixDown(int k) { I"x'
int j; ]O|>nTa
while ((j = k << 1) <= size) { }%XB*pzQ
if (j < size %26amp;%26amp; queue[j] j++; +`F(wk["m
if (queue[k]>queue[j]) file://不用交换 phDIUhL$z
break; ' #K@%P
SortUtil.swap(queue,j,k); ^y>V-R/N
k = j; `he# !"
} KF7w{A){
} Qy:yz
private void fixUp(int k) { l4RqQ+[KA;
while (k > 1) { -)-:rRx-
int j = k >> 1; $PMr)U
if (queue[j]>queue[k]) s~,!E
break; Apu-9|oP
SortUtil.swap(queue,j,k); 1XN%&VR>^D
k = j; i7dDklj4
} Uv59 XF$
} N~|f^#L
7}xQ4M\u$
} Z*Ffdh>*:&
7Ydqg&
} S[y'{;
VY/r2o#
SortUtil： |e8A)xM]wC
0faf4LzU!
package org.rut.util.algorithm; moM'RO,M
K14.!m
import org.rut.util.algorithm.support.BubbleSort; l4kqz.Z-g
import org.rut.util.algorithm.support.HeapSort; ,U9j7E<4
import org.rut.util.algorithm.support.ImprovedMergeSort; 6%EpF;T`
import org.rut.util.algorithm.support.ImprovedQuickSort; azmeJpC
import org.rut.util.algorithm.support.InsertSort; ydD:6bBX
import org.rut.util.algorithm.support.MergeSort; ]9@4P$I
import org.rut.util.algorithm.support.QuickSort; Rs<S}oeLn
import org.rut.util.algorithm.support.SelectionSort; qo9&e~Y<G
import org.rut.util.algorithm.support.ShellSort; 9@t&jznt<
8+!G/p
/** e[k\VYj[
* @author treeroot J*g<]P&p0
* @since 2006-2-2 O#tmB?n*
* @version 1.0 tln}jpCw
*/ <c@dE
public class SortUtil { h(2{+Y+
public final static int INSERT = 1; Gad&3M0r
public final static int BUBBLE = 2; []\-*{^r
public final static int SELECTION = 3; ]UOzz1
public final static int SHELL = 4; MeD/)T{G~
public final static int QUICK = 5; ft8
public final static int IMPROVED_QUICK = 6; '!X`X=
public final static int MERGE = 7; pz2E+o
public final static int IMPROVED_MERGE = 8; }Bh\N5G%
public final static int HEAP = 9; '1!%yKc0
S%p,.0_
public static void sort(int[] data) { =2Ju)!%wr
sort(data, IMPROVED_QUICK); -X EK[
} 34k(:]56|
private static String[] name={ :qXREF@h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /_<_X 7
}; W*H%\Y:N
6jr}l
private static Sort[] impl=new Sort[]{ O0^Y1l
new InsertSort(), 1|*%
new BubbleSort(), t":^:i'M
new SelectionSort(), 3 } $9./+
new ShellSort(), M|{KQ3q:9
new QuickSort(), TbMlYf]It
new ImprovedQuickSort(), +SV!QMIg
new MergeSort(), :^7_E&
new ImprovedMergeSort(), K0*er
new HeapSort() 6mZpyt
}; 2QHu8mFU
a"O9;&};&
public static String toString(int algorithm){ #;2mP6a[
return name[algorithm-1]; :@~3wD[y
} _uh@fRyh
@zR_[s
public static void sort(int[] data, int algorithm) { };(2 na
impl[algorithm-1].sort(data); o) eW5s,6
} .Xta;Py|J
cCtd\/ \
public static interface Sort { qzD
public void sort(int[] data); K(mzt[n(
} C/"Wh=h6
ORo +]9)Yv
public static void swap(int[] data, int i, int j) { -% B)+yq>
int temp = data; k<*1mS8
data = data[j]; ,J*#Ixe}
data[j] = temp; <Dnv=)Rq
} #z}IW(u<
} c_?!V