[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; em{(4!W>
} P{Lf5V9# <
int i1=l; oczG|_
int i2=mid+1; !C4!LZ0A
for(int cur=l;cur<=r;cur++){ X;oa[!k
if(i1==mid+1) u #w29Pm
data[cur]=temp[i2++]; ?9{~> 4@
else if(i2>r) QXgE dsw
data[cur]=temp[i1++]; )wvHGecp*
else if(temp[i1] data[cur]=temp[i1++]; #OO>rm$
else <h-vjz
data[cur]=temp[i2++]; A/7{oB:a
} LJ)5W
} 7!WA)@6
Om;&_!i
} !%)FJ:p
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改进后的归并排序: BZ54*\t
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package org.rut.util.algorithm.support; `-h8vj5uG
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import org.rut.util.algorithm.SortUtil; m,UGWR
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/** ngohtB^]
* @author treeroot 2;a(8^n
* @since 2006-2-2 myl+J;,]
* @version 1.0 +ZM)bbB
*/ ="wzq+U
public class ImprovedMergeSort implements SortUtil.Sort { y*pUlts<
l*\y
private static final int THRESHOLD = 10; PYbVy<xc
}G4ztiuG
/* *t[. =_v
* (non-Javadoc) E:9"cxx
* Ez|oN,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FKNMtp[`
*/ J_x13EaV0
public void sort(int[] data) { =U%Rvm
int[] temp=new int[data.length]; -K9c@?
mergeSort(data,temp,0,data.length-1); |KSy`lY-j>
} 1cS}J:0P
AP77a*@8
private void mergeSort(int[] data, int[] temp, int l, int r) { {M-YHX>*;g
int i, j, k; <Ln1pV~k
int mid = (l + r) / 2; S}p4iE"n
if (l == r) |7yAX+
return; P9g en6
if ((mid - l) >= THRESHOLD) V=:'SL*3|
mergeSort(data, temp, l, mid); i;LXu%3\
else z9FfU
insertSort(data, l, mid - l + 1); g35DV6
if ((r - mid) > THRESHOLD) Tq]Sn]CSP
mergeSort(data, temp, mid + 1, r); =jB08A
else [<DZ*|+
insertSort(data, mid + 1, r - mid); KD`IX-r{s
&l3iV88
for (i = l; i <= mid; i++) { Oo"^%F~%
temp = data; Ag{iq(X
} d&ex5CU5
for (j = 1; j <= r - mid; j++) { J5^'HU3
temp[r - j + 1] = data[j + mid]; &boOtl^
} Zt.'K(]2h
int a = temp[l]; rM'=_nmi
int b = temp[r]; xx[9~z=d
for (i = l, j = r, k = l; k <= r; k++) { ZI=%JU(
if (a < b) { "@??Fw!
data[k] = temp[i++]; *h}XWBC1q
a = temp; $s9Vrw0Z
} else { {r@Ty*W} L
data[k] = temp[j--]; gw,UQbnu
b = temp[j]; ma"3qGy
} ]IoUwgpI)
} emCM\|NQg&
} ek#O3Oz
S H!
/** 6Yx4lWBR?
* @param data .Fdgb4>BXX
* @param l ;W>k@L
* @param i l c+g&f
*/ 9FB19
private void insertSort(int[] data, int start, int len) { zT!drq:x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DRcNdO/1E
} &*+'>UEe5
} `DV.+>O-1
} C?lcGt!H
} Y;?{|
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堆排序： V5UF3'3;}
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package org.rut.util.algorithm.support; 9I&xfvD,
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import org.rut.util.algorithm.SortUtil; i\,-oO
7Zlw^'q$:L
/** M7pOLP_1jB
* @author treeroot WA+iYLx@H
* @since 2006-2-2 ,yiX# ;j
* @version 1.0 `$ 6rz
*/ ~_/(t'9
public class HeapSort implements SortUtil.Sort{ "*In+!K
7pe\M/kl
/* (non-Javadoc) uScMn/%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A"L&a l$i
*/ gt@m?w(
public void sort(int[] data) { -*1J f&
MaxHeap h=new MaxHeap(); #qK:J;Sn3
h.init(data); |y(Q
for(int i=0;i h.remove(); f&Gt|
System.arraycopy(h.queue,1,data,0,data.length); }H^+A77v
} )h7<?@wv&
e)d`pQ6
private static class MaxHeap{ <J)]mh dm
'@_d(N1jTw
void init(int[] data){ |olA9mp|]
this.queue=new int[data.length+1]; nAv#?1cjz
for(int i=0;i queue[++size]=data; aDU<wxnSvO
fixUp(size); |?,A]|j
} 1q7|OWFT
} f4fvrL
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private int size=0; 8WXQOo8
PvPOU"
private int[] queue; ,Q
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public int get() { t'n pG}`tE
return queue[1]; -XB/lnG
} A^USBv+9`
JMC. w!
public void remove() { hgPa6Kd
SortUtil.swap(queue,1,size--); ;ub;lh3
fixDown(1); V<GHpFi0
} X $jWo@
file://fixdown ZOh`(})hy
private void fixDown(int k) { !2%HhiB'
int j; ,o86}6Ag
while ((j = k << 1) <= size) { H?yK~bGQ
if (j < size %26amp;%26amp; queue[j] j++; l9{hq/V
if (queue[k]>queue[j]) file://不用交换 "\w 7q
break; g6j?,c|y
SortUtil.swap(queue,j,k); 9jM}~XvV
k = j; H\ F:95
} Lt64JH^lz
} (A9Fhun
private void fixUp(int k) { 0X6YdW_2X
while (k > 1) { J')o|5S1N
int j = k >> 1; geru=7
if (queue[j]>queue[k]) Z^3rLCa
break; m*&]!mM"0G
SortUtil.swap(queue,j,k); ?9 <:QE;I>
k = j; aTH{'mN
} +$ 'Zf0U
} p`olCp'
lXW%FH6c+
} u^^[Q2LDU}
BC^ :=
} bRFLcM
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SortUtil： DX#Nf""Pw
mE+*)gb:Rd
package org.rut.util.algorithm; ~Y^+M*
Sc]B#/~B
import org.rut.util.algorithm.support.BubbleSort; +}Dw3;W}m
import org.rut.util.algorithm.support.HeapSort; xQ7l~O b
import org.rut.util.algorithm.support.ImprovedMergeSort; fDv2JdiU
import org.rut.util.algorithm.support.ImprovedQuickSort; V5+=e^pa2
import org.rut.util.algorithm.support.InsertSort; s}vAS~~2L3
import org.rut.util.algorithm.support.MergeSort; j'Fpjt"&=
import org.rut.util.algorithm.support.QuickSort; <sb~ ^B
import org.rut.util.algorithm.support.SelectionSort; }bb;~
import org.rut.util.algorithm.support.ShellSort; T<n
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/** V(H1q`ao9
* @author treeroot o_izl\
* @since 2006-2-2 Ua:}Vn&!
* @version 1.0 ^UP`%egR
*/ &GpRI(OB/+
public class SortUtil { P78g/p T
public final static int INSERT = 1; @a! #G
public final static int BUBBLE = 2; Dj"F\j 1
public final static int SELECTION = 3; Wf+cDpK
public final static int SHELL = 4; $0W|26;
public final static int QUICK = 5; g2+2%6m0
public final static int IMPROVED_QUICK = 6; n1Yp1"2b[
public final static int MERGE = 7; zO-z%y
public final static int IMPROVED_MERGE = 8; Ouk^O}W6
public final static int HEAP = 9; Vr3Zu{&2
rDdoOb]B
public static void sort(int[] data) { x[ SDl(<@;
sort(data, IMPROVED_QUICK); 7`*h2 mgY
} ROH|PKb7
private static String[] name={ =Qy<GeY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \j$&DCv
}; q`Go`v
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private static Sort[] impl=new Sort[]{ s:n6rG
new InsertSort(), ?qb}?&1
new BubbleSort(), (d(CT;
new SelectionSort(), Amtq"<h9a
new ShellSort(), wW Lj?;bx
new QuickSort(), u+9hL4
new ImprovedQuickSort(), ahusta
new MergeSort(), y6g&Y.:o
new ImprovedMergeSort(), cn3#R.G~
new HeapSort() ^ gdaa>L
}; ) ;EBz
tj'\tW+s'
public static String toString(int algorithm){ on4HKeO
return name[algorithm-1]; /T"+KU*
} `aOFs+<)
* `JYC
public static void sort(int[] data, int algorithm) { l[dK[4
impl[algorithm-1].sort(data); aS>u,=C
} K%t*8 4j
Kew@&j~
public static interface Sort { j`EXlc~
public void sort(int[] data); ))qy;Q,
} C"y(5U)d
dn&s*
public static void swap(int[] data, int i, int j) { {y)=eX9
int temp = data; CT&|QH{
data = data[j]; 5tl< 3g`
data[j] = temp; ` ./$&'
} =7?4eYHC
} l5~os>