[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; /aa;M*Qp
} L0VR(
int i1=l; S^VV^O5 ^
int i2=mid+1; "#k(V=y
for(int cur=l;cur<=r;cur++){ E=*Q\3G~
if(i1==mid+1) wEc5{ b5M
data[cur]=temp[i2++]; 3M*[a~
else if(i2>r) wP1VQUL
data[cur]=temp[i1++]; CgKSK0/a
else if(temp[i1] data[cur]=temp[i1++]; 1p<?S}zg@
else :tG".z
data[cur]=temp[i2++]; K y2xWd8
} wXGFq3`
} 1WN93SQ=
LHz<=]?@
} W}_}<rlF
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改进后的归并排序: /)4r2x
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package org.rut.util.algorithm.support; i4r~eneP
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import org.rut.util.algorithm.SortUtil; SW'KYzn
<d`UifqD
/** 6i9I 4*'
* @author treeroot 2^M+s\p
* @since 2006-2-2 oP75|p
* @version 1.0 jtr=8OiL
*/ {$:13AnK
public class ImprovedMergeSort implements SortUtil.Sort { "FIx^
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private static final int THRESHOLD = 10; b}*bgx@<
&Q+V I/p
/* ',j-n$Z^=
* (non-Javadoc) &D w~Jq|
* ]~Qkg+>'&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6lAo`S\)eX
*/ )9Ojvp=#r:
public void sort(int[] data) { ^!Jm/-
int[] temp=new int[data.length]; <Pt\)"JA
mergeSort(data,temp,0,data.length-1); s9bP6N!,
} GnaVI
R_&z2I
private void mergeSort(int[] data, int[] temp, int l, int r) { OSIp
int i, j, k; W3rvKqdw5
int mid = (l + r) / 2; S IK{GWX
if (l == r) ;<<IXXKU
return; S$On$]~\"
if ((mid - l) >= THRESHOLD) 2`m_"y
mergeSort(data, temp, l, mid); @il}0
else CWYJ<27v{
insertSort(data, l, mid - l + 1); B[X6AQj}d
if ((r - mid) > THRESHOLD) to=##&ld<
mergeSort(data, temp, mid + 1, r); i}"JCqo2
else D}3fx[
insertSort(data, mid + 1, r - mid); Vp^sER
n7uD(cL
for (i = l; i <= mid; i++) { g(H3arb&
temp = data; vJUB;hD
} NmF2E+'
for (j = 1; j <= r - mid; j++) { rNC3h"i\
temp[r - j + 1] = data[j + mid]; t O>qd#I
} Lpf=VyqC
int a = temp[l]; !P3|T\|]+
int b = temp[r]; /U]5#'i
for (i = l, j = r, k = l; k <= r; k++) { oU?X"B9
if (a < b) { W^Y(FUy~
data[k] = temp[i++]; W%cPX0
a = temp; b7j#a#
} else { d6&tz!f
data[k] = temp[j--]; 9Wrclai
b = temp[j]; 9<mj@bI$
} GqxK|G1
} b;l%1x9r
} 1*jm9])#
iL1so+di
/** ,[#f}|s_
* @param data cfS]C_6d
* @param l .r'.5RI A
* @param i \0*LfVr;P
*/ rRel\8
private void insertSort(int[] data, int start, int len) { V= PoQ9d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^]gl#&"D
} {'kL]qLg
} #JucOWxjY
} '~J6mojE
} 1Tr=*b %f
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堆排序： Y))sk-
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package org.rut.util.algorithm.support; p\\q[6
h zE)>f
import org.rut.util.algorithm.SortUtil; ]:fHvx_?`7
ApB0)N
/** Cx~z^YP'
* @author treeroot 8t!"K_Mkx
* @since 2006-2-2 xpwzzO*U
* @version 1.0 cTp+M L
*/ bxq`E!]
public class HeapSort implements SortUtil.Sort{ cgOoQP/#
K? k`U,
/* (non-Javadoc) FG\?_G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %xz02$k
*/ sNVD"M,
public void sort(int[] data) { h+@t8Q;gGw
MaxHeap h=new MaxHeap(); WcFZRy-erc
h.init(data); ! +7ve[z
for(int i=0;i h.remove(); HfPeR8I%i
System.arraycopy(h.queue,1,data,0,data.length); "RA$Twhj
} t:7jlD!d
k$!&3Rh
private static class MaxHeap{ -bF+uCfba
CuNHDYQ&3
void init(int[] data){ Ipx:k+J
this.queue=new int[data.length+1]; ><qE5D[
for(int i=0;i queue[++size]=data; 1S:H!h3
fixUp(size); >2/zL.O
} mgWtjV 8
} jXf-+;ZQ
9nE%r\H
private int size=0; 5hMiCod
)j'b7)W\
private int[] queue; &IYkeGQr
0 CS_-
public int get() { {5h_$a!TaU
return queue[1]; (%Rs&/vU~
} ~fe0Ba4
3Y8 V?* 1|
public void remove() { Z#04 ]
SortUtil.swap(queue,1,size--); Tw5BvB1
fixDown(1); }s[/b"%y
} ]\U'_G2]
file://fixdown ZHJzh\?
private void fixDown(int k) { WyETg!b[
int j; e|P60cd /
while ((j = k << 1) <= size) { VrK5a9*^
if (j < size %26amp;%26amp; queue[j] j++; f WXzK<
if (queue[k]>queue[j]) file://不用交换 P.Bk-#}$
break; 4dP_'0]9A:
SortUtil.swap(queue,j,k); )LG/n
k = j; Y'T#
} p pq#5t^[)
} 6BnjT
private void fixUp(int k) { xT/&'$@{)
while (k > 1) { W+E2({
int j = k >> 1; &AVi4zV
if (queue[j]>queue[k]) qz&)|~,\C
break; 3^Y-P8.zdB
SortUtil.swap(queue,j,k); $B2@mC([S
k = j; RZZB?vx
} P}jr 8Z
} |Th{*IJ<,
K2QD&!4/T2
} By9/tB
`*a,8M%
} i]v!o$7
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SortUtil： ?0x;L/d])
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package org.rut.util.algorithm; z$NLFJvy_-
~ocr^V{"<~
import org.rut.util.algorithm.support.BubbleSort; wHmEt ORo
import org.rut.util.algorithm.support.HeapSort; R)=<q]Ms
import org.rut.util.algorithm.support.ImprovedMergeSort; ?:E;C<Ar
import org.rut.util.algorithm.support.ImprovedQuickSort; vuf|2!kh/
import org.rut.util.algorithm.support.InsertSort; D<`X B*
import org.rut.util.algorithm.support.MergeSort; yT4|eHl
import org.rut.util.algorithm.support.QuickSort; VWi-)
import org.rut.util.algorithm.support.SelectionSort; |8B[yr.b
import org.rut.util.algorithm.support.ShellSort; {~SR>I3sv
y[cAU:P?
/** >7|37a
* @author treeroot *K;~V
* @since 2006-2-2 =ZQIpc
* @version 1.0 };*5+XY^
*/ RwE]t$T/
public class SortUtil { [o~w>,a
public final static int INSERT = 1; ,<BTv;4p
public final static int BUBBLE = 2; ;p/@tr9
public final static int SELECTION = 3; 8c9_=8vw
public final static int SHELL = 4; &Ru6Yt0W
public final static int QUICK = 5; Dz?F,g_
public final static int IMPROVED_QUICK = 6; _?ym,@}#
public final static int MERGE = 7; Z+?j8(:n
public final static int IMPROVED_MERGE = 8; G>Q{[m$
public final static int HEAP = 9; < 5ow81
.XmD[=
public static void sort(int[] data) { :X^B1z3X4
sort(data, IMPROVED_QUICK); tua+R_"
} L4!$bB~L-
private static String[] name={ 7;XdTx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _AFgx8
}; 7Q`4*H6
Lv_>cFJ}[
private static Sort[] impl=new Sort[]{ SG~R!kN}Q
new InsertSort(), fKfi
new BubbleSort(), ,O2F}5|;
new SelectionSort(), Jd |hwvwFe
new ShellSort(), WIg"m[aIs
new QuickSort(), NS1[-ng
new ImprovedQuickSort(), ,MLPVDN*D
new MergeSort(), @*oi1_q
new ImprovedMergeSort(), TzOf&cs/r
new HeapSort() tFGLqR%/
}; "Xm'(c(
N5_v}<CN
public static String toString(int algorithm){ h3:k$`_
return name[algorithm-1]; D526X0
} "x{S3v4Rb5
/4|qfF3
public static void sort(int[] data, int algorithm) { FUDMaI
impl[algorithm-1].sort(data); qG;WX n
} -x7L8Wj
e1H.2n{y^
public static interface Sort { K= 69z
public void sort(int[] data); Po2YDj`
} !} 1p:@
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public static void swap(int[] data, int i, int j) { =$m|M m[a
int temp = data; I=1tf;Bsi
data = data[j]; 6} 9A0
data[j] = temp; O:#to
} m,pDjf
} f.,-KIiF