[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; dr:x0>
} g3>>gu#0DC
int i1=l; hd~#I<8;2
int i2=mid+1; vO~Tx
for(int cur=l;cur<=r;cur++){ CEc(2q+%i
if(i1==mid+1) ,qv\Y]
data[cur]=temp[i2++]; L~Peerby
else if(i2>r) -`* 'p i
data[cur]=temp[i1++]; {tY1$}R
else if(temp[i1] data[cur]=temp[i1++]; kmc"`Ogotw
else "#E<Leh'
data[cur]=temp[i2++]; <<A#4!f
} n-l_PhPQ`
} ~~-VScG&
ftR& 5!Wm
} 83t/\x,Q
c3g`k"3*`
改进后的归并排序: ?Y,^Moc:
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package org.rut.util.algorithm.support; Z_m<x!
}YFM40H
import org.rut.util.algorithm.SortUtil; Mh5> hD
5:f!EMb
/** L6{gwoZf3
* @author treeroot 6WGg_x?3
* @since 2006-2-2 }P.Z}n;Uj
* @version 1.0 Q+9:]Bt
*/ ".(vR7u'
public class ImprovedMergeSort implements SortUtil.Sort { D_czUM
\WE&5 9G
private static final int THRESHOLD = 10; M.- {->
?dCwo;~
/* PRaVe,5a
* (non-Javadoc) n{sk
* &|#[.ti1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B#jnM~fJz
*/ nv@z;#&
public void sort(int[] data) { k)S1Zs~G
int[] temp=new int[data.length]; E(|A"=\
mergeSort(data,temp,0,data.length-1); #5)/B
} v>B412l
|yeQz
private void mergeSort(int[] data, int[] temp, int l, int r) { 0h*Le
int i, j, k; 6` TwP\!$/
int mid = (l + r) / 2; Z}uY%]
if (l == r) $$1t4=Pz
return; "}*D,[C5e
if ((mid - l) >= THRESHOLD) wb?k
mergeSort(data, temp, l, mid); gI;"PkN
else `7:uc@
insertSort(data, l, mid - l + 1); eQu(3sYb
if ((r - mid) > THRESHOLD) j0; ~2W#G*
mergeSort(data, temp, mid + 1, r); :1j8!R5
else X%IqZ{{
insertSort(data, mid + 1, r - mid); -GPJ,S V>
Nyy&'\`!
for (i = l; i <= mid; i++) { jo<xrn\
temp = data; HC6U_d1-6
} C:t>u..
for (j = 1; j <= r - mid; j++) { #[{{&sN
temp[r - j + 1] = data[j + mid]; EpMxq7*
} >U{iof<
int a = temp[l]; /)Cfm1$ic
int b = temp[r]; VbvP!<8
for (i = l, j = r, k = l; k <= r; k++) { T3{~f
if (a < b) { /h+ W L
data[k] = temp[i++]; dnoF)(d&Cm
a = temp; K!&W}_@l
} else { z0<E3t
data[k] = temp[j--]; nZ(]WPIN"
b = temp[j]; BKg8p]`+
} .s*N1 U?h
} F8?2+w@P
} '@.6Rd 8
/x ?@Mn>
/** VGeTX 4h
* @param data nwKp8mfP
* @param l (6ga*5<
* @param i h2Nt@
*/ )4=86>XJT
private void insertSort(int[] data, int start, int len) { OA&'T*)-A6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E.Xp\Dm71
} M0fN[!*z
} iv~R4;;)
} Nt@|l7Xl*
} ,Zn6T"[$
H%vfRl3rB
堆排序： T(?w}i
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package org.rut.util.algorithm.support; HfVHjF)
?uSoJM`wa!
import org.rut.util.algorithm.SortUtil; FAdTm#tgW]
Qy"Jt]O
/** M\m:H3[
* @author treeroot `CS\"|z
* @since 2006-2-2 Lxp}o7>K
* @version 1.0 GLtWo+g0
*/ {q)d
public class HeapSort implements SortUtil.Sort{ H_RfIX)X
iN Oj@3x
/* (non-Javadoc) w<`0D)mQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I2$DlEke
*/ {k3ItGQ_
public void sort(int[] data) { =m2_:&@0x
MaxHeap h=new MaxHeap(); W:RjWn@<
h.init(data); 2~$S @c
for(int i=0;i h.remove(); ),p0V
System.arraycopy(h.queue,1,data,0,data.length); M/p9 I gp
} ?0/$RpFEM#
x!_5/
private static class MaxHeap{ 0Gs\x
w/*G!o-<
void init(int[] data){ ]!{S2x&"
this.queue=new int[data.length+1]; ]M*`Y[5"
for(int i=0;i queue[++size]=data; I:TbZ*vi~
fixUp(size); "Wg,]$IvU
} :1*E5pX0n
} TxPFl7,r
&RZO\ZT
private int size=0; ) 1AAL0F\B
F9j@KC(yg
private int[] queue; tC'E#2
=6dAF"b)
public int get() { NF8<9
return queue[1]; )%@7tx
} %JE>Z]
xkDK5&V
public void remove() { \PxT47[@e
SortUtil.swap(queue,1,size--); N=\zx^w,
fixDown(1); eTp|!T
} Nf)YG!
file://fixdown v=@y7P1
private void fixDown(int k) { r5~W/eE
int j; @bA5uY!
while ((j = k << 1) <= size) { $@'BB=i
if (j < size %26amp;%26amp; queue[j] j++; X3}eq|r9
if (queue[k]>queue[j]) file://不用交换 cOV9g)7^O
break; c},pu[nL
SortUtil.swap(queue,j,k); 5FR#CQ
k = j; x9Z89Gwi
} XZKlE F?
} {nwoJ'-V
private void fixUp(int k) { {jO+N+Ez9
while (k > 1) { L6_%SGY_iE
int j = k >> 1; s<{ Hu0K$
if (queue[j]>queue[k]) V gMgeja
break; ]_h3
SortUtil.swap(queue,j,k); j2Dw7"f3
k = j; **h4M2'C
} kZG.Id
} d MR?pbD
v`,!wS
} OlCqv-B2&
"HJ^>%ia
} ?{ExBZNa
v%qOW)].
SortUtil： ! eZls
wU+r]SK@
package org.rut.util.algorithm; 7G_<+rn
6HK1?
import org.rut.util.algorithm.support.BubbleSort; <{cY2cx~3
import org.rut.util.algorithm.support.HeapSort; 6 ^3RfF^W
import org.rut.util.algorithm.support.ImprovedMergeSort; o`c+eMwr(
import org.rut.util.algorithm.support.ImprovedQuickSort; ~Tt@v`}
import org.rut.util.algorithm.support.InsertSort; C^"zU>W_
import org.rut.util.algorithm.support.MergeSort; eY :"\c3
import org.rut.util.algorithm.support.QuickSort; =T9h7c R
import org.rut.util.algorithm.support.SelectionSort; j<~Wp$\i7>
import org.rut.util.algorithm.support.ShellSort; 3FR(gr$X
SQ,-45@W
/** '*y(F*7+
* @author treeroot j_2g*lQ7a
* @since 2006-2-2 TMMKRC1<
* @version 1.0 !=:>yWQ
*/ \B4H0f
public class SortUtil { h]s6)tII
public final static int INSERT = 1; gw"cXny
public final static int BUBBLE = 2; Cy?]o?_?
public final static int SELECTION = 3; 1]:,Xa+|S
public final static int SHELL = 4; {KHI(*r;
public final static int QUICK = 5; 2%WeB/)9
public final static int IMPROVED_QUICK = 6; ,CyX*k8o
public final static int MERGE = 7; 68z#9}
public final static int IMPROVED_MERGE = 8; U*a#{C7"
public final static int HEAP = 9; {%3WHGr%L
"yw{A%J
public static void sort(int[] data) { <)TIj6
sort(data, IMPROVED_QUICK); .rk5u4yK
} "]=OR>
private static String[] name={ @}4>:\es
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X&zGgP/
}; +zMhA p
)r46I$]>
private static Sort[] impl=new Sort[]{ GPHb-
new InsertSort(), + -Rf@
new BubbleSort(), 6HCg<_j]
new SelectionSort(), q#3T L<
new ShellSort(), %J1'>nI!q
new QuickSort(), # QwX|x{
new ImprovedQuickSort(), 6c]4(%8
new MergeSort(), @;eH~3P
new ImprovedMergeSort(), 6 EqN>.
new HeapSort() G06;x
}; F\N0<o
7#C$}1XJ1
public static String toString(int algorithm){ \L(jNN0_R
return name[algorithm-1]; bWA_a]G
} T@ESMPeU:X
k4$zM/ob
public static void sort(int[] data, int algorithm) { q+9^rQ
impl[algorithm-1].sort(data); x,^-a
} 9R$$(zB 1;
m~Pk]~j
public static interface Sort { ~:JAWs$\V
public void sort(int[] data); bji#ID2]%
} {oY"CZ2
>Y4^<!\v
public static void swap(int[] data, int i, int j) { YA@?L!F
int temp = data; :4zPYG o
data = data[j]; lknj/i5L
data[j] = temp; }K'A/]'
} SlB`ktcfI
} a&G{3#l