[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,8t!Y
} Xv 7noq|
int i1=l; A5sz[k
int i2=mid+1; yI%q3lB}^
for(int cur=l;cur<=r;cur++){ Nc?'},
if(i1==mid+1) KD--w(4
data[cur]=temp[i2++]; `A8ErfA
else if(i2>r) sR)jZpmC(
data[cur]=temp[i1++]; 9d!mGnl
else if(temp[i1] data[cur]=temp[i1++]; nt%p@e!,
else Hv%$6,/*v
data[cur]=temp[i2++]; V$dhiP z
} (?"z!dgc
} 3kVN[0
Au:R]7
} zA/Fh(uX
3h}i="i
改进后的归并排序: M6].V*k'2
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package org.rut.util.algorithm.support; /+m2|Ij(
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import org.rut.util.algorithm.SortUtil; |AS<I4+&
f{P?|8u
/** ]oC"gWDYu
* @author treeroot !w;/J^
* @since 2006-2-2 [c v!YE
* @version 1.0 -TS,~`O
*/ 8fPTxvXqL
public class ImprovedMergeSort implements SortUtil.Sort { >oC{YYcK
`O0y8
private static final int THRESHOLD = 10; d;{k,rP6
O9AFQ)u
/* Ep3I*bQ Y
* (non-Javadoc) aS~~*UHW
* n98sY+$-z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Bi%8G
*/ 2HF`}H)H
public void sort(int[] data) { Z_[L5B]Gwd
int[] temp=new int[data.length]; !-ZY_
mergeSort(data,temp,0,data.length-1); 1X9J[5|ll
} |f(*R_R
$KlaZ>Dh
private void mergeSort(int[] data, int[] temp, int l, int r) { d$Y_vX<
int i, j, k; (;-_j/
int mid = (l + r) / 2; 3jHg9M23[^
if (l == r) .bj:tmz
return; q4,/RZhzh
if ((mid - l) >= THRESHOLD) dXsD%sG@
mergeSort(data, temp, l, mid); =y`-:j\
else 6;;2e> e
insertSort(data, l, mid - l + 1); :39arq
if ((r - mid) > THRESHOLD) vJS}_j]_@
mergeSort(data, temp, mid + 1, r); oe!4ng[
else m7i(0jd +
insertSort(data, mid + 1, r - mid); }{Ra5-PY
+[4y)y`
for (i = l; i <= mid; i++) { U]g9t<jD
temp = data; *p9k> )'J
} N7YCg
for (j = 1; j <= r - mid; j++) { B![:fiR`
temp[r - j + 1] = data[j + mid]; <qEBF`XP=
} :[0)Uu{
int a = temp[l]; 9~jS_Y)"
int b = temp[r]; 1qBE|PwBp
for (i = l, j = r, k = l; k <= r; k++) { X-J85b_e
if (a < b) { *kcc]*6@s
data[k] = temp[i++]; 6~x a^3G:
a = temp; tD4-Llj6
} else { I&<'A[vHl
data[k] = temp[j--]; $RUK<JN$6
b = temp[j]; u! dx+vd
} ^Y5I OX:
} #rNc+
} UT[{NltH
$xcZ{C
/** {L [
* @param data {JF"PAS7
* @param l 'yV*eG?^&
* @param i 34nfL: y
*/ =%s6QFR
private void insertSort(int[] data, int start, int len) { NytodVZ'3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1GB]Yi[>
} 16 \)C/*
} C%CgWO`Xj
} q?@*
} v>N*f~n
Wu(^k25
堆排序： _x^rHADp
i ^2A:6}?
package org.rut.util.algorithm.support; AlkHf]oB
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import org.rut.util.algorithm.SortUtil; owb+,Gk(
^7Z;=]8J
/** %b2Hm9r+
* @author treeroot RzzU+r
* @since 2006-2-2 :R>RCR2g)
* @version 1.0 k8%@PC$
*/ ZX8@/8sv
public class HeapSort implements SortUtil.Sort{ (U_HX2f
yK$aVK"
/* (non-Javadoc) Ih4$MG6QC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UBk:B
*/ c;06>1=wP5
public void sort(int[] data) { OK YbEn#
MaxHeap h=new MaxHeap(); %d%?\jVb
h.init(data); MUGoW;}v)
for(int i=0;i h.remove(); RDjw|V
System.arraycopy(h.queue,1,data,0,data.length); EuImj#Zl
} He}?\C Bo
[-\U)>MY(p
private static class MaxHeap{ .D\oKhV(
sLXM$SMBh
void init(int[] data){ Fw t
this.queue=new int[data.length+1]; c\&;Xr
for(int i=0;i queue[++size]=data; \sfc!5G
fixUp(size); '>n&3`r5
} `H$=hr
} GIn%yB'
p .P#S
private int size=0; 5h0Hk<N
Ei\>gXTH1-
private int[] queue; 5`gVziS!S
wu`+KUx
public int get() { kM&-t&7
return queue[1]; "*N#-=MJF
} *'aouS/?<6
.kMnq8u
public void remove() { )N607 Fa-
SortUtil.swap(queue,1,size--); 5MKM;6cA&p
fixDown(1); 2oRwDg&7|
} z!18Jh
file://fixdown aDxNAfP
private void fixDown(int k) { AXSip
int j; YRr,{[e
while ((j = k << 1) <= size) { 'mTY56Yq
if (j < size %26amp;%26amp; queue[j] j++; udIm}jRA"
if (queue[k]>queue[j]) file://不用交换 -.ZP<,?@F
break; \i@R5v=zL
SortUtil.swap(queue,j,k); .:B>xg~2
k = j; [@8po-()L
} kWy@wPqms
} b-#lKWso
private void fixUp(int k) { M_.Jmh<&&
while (k > 1) { m%>}T75C^
int j = k >> 1; ^cSfkBh
if (queue[j]>queue[k]) }#%YeCA?
break; -!O8V
SortUtil.swap(queue,j,k); $`ptSR
k = j; "#-iD
} (Z[c7
} ZH8w^}
(_CvN=A
} ^FBu|eAkE
8"g+ k`PRy
} MSeg7/MF
=T&<z_L
SortUtil： e84%Y8,0
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package org.rut.util.algorithm; \AA9 m'BZ
1_v\G
import org.rut.util.algorithm.support.BubbleSort; %"fO^KA.h]
import org.rut.util.algorithm.support.HeapSort; <eS/-W%n6
import org.rut.util.algorithm.support.ImprovedMergeSort; 3o/f, }_
import org.rut.util.algorithm.support.ImprovedQuickSort; |YyNqwP`,
import org.rut.util.algorithm.support.InsertSort; gO"G/
import org.rut.util.algorithm.support.MergeSort; F ]Zg
import org.rut.util.algorithm.support.QuickSort; >A6W^J|[
import org.rut.util.algorithm.support.SelectionSort; wy${EY^h
import org.rut.util.algorithm.support.ShellSort; ilHf5$
&z:bZH]DH
/** ?eX/vqk
* @author treeroot yt="kZ
* @since 2006-2-2 As,e.V5!
* @version 1.0 Ut;4`>T
*/ |UMm>.\'
public class SortUtil { t8h*SHD9
public final static int INSERT = 1; -T{2R:\{
public final static int BUBBLE = 2; nXoDI1<[
public final static int SELECTION = 3; K<`Z@f3'w
public final static int SHELL = 4; l"nS+z
public final static int QUICK = 5; $qdynKK
public final static int IMPROVED_QUICK = 6; *?HoN;^
public final static int MERGE = 7; HF_8661g
public final static int IMPROVED_MERGE = 8; ss-6b^
public final static int HEAP = 9; eA-oqolY
nK?S2/o#A
public static void sort(int[] data) { C~@m6K
sort(data, IMPROVED_QUICK); f+n {9Hz
} ~wv$uL8y
private static String[] name={ $L6R,%c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NFx%e
}; -)')PV_+
jG;J qT
private static Sort[] impl=new Sort[]{ {cIk-nG-_
new InsertSort(), EK"/4t{L_
new BubbleSort(), OW\vbWX
new SelectionSort(), 87+fd_G
new ShellSort(), =mZYBm,IQ
new QuickSort(), Y:,C_^$w;
new ImprovedQuickSort(), jaKW[@<
new MergeSort(), x< 2]UB`
new ImprovedMergeSort(), R<6y7?]bZ
new HeapSort() w?|qKO
}; ; YQB
g@4~,
public static String toString(int algorithm){ [R%*C9Y d
return name[algorithm-1]; 4W*o:Y!
} K$/"I0YyI
'b}RFzEn
public static void sort(int[] data, int algorithm) { /NCN wAj7
impl[algorithm-1].sort(data); :adz~L$
} OQKg/1
5>0\=
public static interface Sort { KRT&]2
public void sort(int[] data); fd>{UyU
} -k8sR1(
GF%/q:9
public static void swap(int[] data, int i, int j) { uK"FopUJ4i
int temp = data; 'F.P93
data = data[j]; W4d32+V
data[j] = temp; ^tG,H@95
} ly[dV.<P
} GuU-<*u(d