[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; TM?7F2
} uq_h8JH$
int i1=l; }Q%fY&#(bp
int i2=mid+1; Ax"I$6n>
for(int cur=l;cur<=r;cur++){ /e4#DH
if(i1==mid+1) V0'_PR@;
data[cur]=temp[i2++]; O4w:BWVsn
else if(i2>r) L}5IX)#gH
data[cur]=temp[i1++]; Dt8wd,B
else if(temp[i1] data[cur]=temp[i1++]; txW<r8
else ,1g*0W^
data[cur]=temp[i2++]; W_z?t;
} PM!7ci
} 1O]27"9
O`W&`B(*k
} kVu-,OU
\qh -fW; #
改进后的归并排序: {|Pz9a-:
VIjsz42C
package org.rut.util.algorithm.support; 9Ucn 6[W
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import org.rut.util.algorithm.SortUtil; :g[G&Ds8
]kd )j
/** Z2dy|e(c
* @author treeroot * 5Y.9g3)Q
* @since 2006-2-2 KGI0|Z]n~
* @version 1.0 2o5v{W
*/ }uE8o"q
public class ImprovedMergeSort implements SortUtil.Sort { H21\6 GY
Ck0R%|
private static final int THRESHOLD = 10; t"@:a Y"
hA81(JWG
/* @BZ6{@*
* (non-Javadoc) ]8XY"2b
* ]'UO]i/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >cPB:kD'
*/ 3eg<)
public void sort(int[] data) { KR6*)?c`
int[] temp=new int[data.length]; J0U9zI4
mergeSort(data,temp,0,data.length-1); \ l+RX*
} eiF!yk?2
Lw]:/x
private void mergeSort(int[] data, int[] temp, int l, int r) { nuB@Fkr
int i, j, k; OT9\K_
int mid = (l + r) / 2; }Vpr7_
if (l == r) _=_]Yx
return; pX]*&[X?
if ((mid - l) >= THRESHOLD) 6?0^U 9
mergeSort(data, temp, l, mid); 9_rNJLj8y
else )T:{(v7 d`
insertSort(data, l, mid - l + 1); 1@Bq-2OD4
if ((r - mid) > THRESHOLD) W&]grG2/
mergeSort(data, temp, mid + 1, r); l|ZwZix
else sa`7_KB
insertSort(data, mid + 1, r - mid); '!!w|kd
'?5=j1
for (i = l; i <= mid; i++) { 3R?7&oXvH
temp = data; ` BH8v
} "RH2%
for (j = 1; j <= r - mid; j++) { }(-R`.e;
temp[r - j + 1] = data[j + mid]; <>f
} Y$EqBN
int a = temp[l]; *&B*/HAN
int b = temp[r]; vhEPk2wD,
for (i = l, j = r, k = l; k <= r; k++) { i6r%;ueLb
if (a < b) { A~-e?.
data[k] = temp[i++]; xkOyj`IS
a = temp; b^PYA_k-Xn
} else { !xMyk>%2
data[k] = temp[j--]; !wvP24"y
b = temp[j]; 6Pl$DSu
} Mno4z/4{A
} K(Otgp+zb
} <!&nyuSz
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/** J']1^"_'
* @param data A7-QOqST(
* @param l f6^H Q1SSt
* @param i c3!d4mC:
*/ aD3'gc,l
private void insertSort(int[] data, int start, int len) { 6+FmYp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FgQd7p
} a)4.[+wnRf
} `#2}[D
} ]gkI:scPA
} Eti;(>"@
,;H)CUe1"
堆排序： J`uV $l:
qJVW :$1q
package org.rut.util.algorithm.support; 6I72;e^!
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import org.rut.util.algorithm.SortUtil; 2>.B*P
z`xdRe{QP
/** <y\>[7Y
* @author treeroot Gu|}ax"
* @since 2006-2-2 yFshV\
* @version 1.0 CG@ LYN
*/ &I:5<zK{
public class HeapSort implements SortUtil.Sort{ tV@!jaj\
%gJf&A
/* (non-Javadoc) #)hM]=,e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4rc4}Yu,JI
*/ V3xC"maA@
public void sort(int[] data) { :U0z;
MaxHeap h=new MaxHeap(); 7P?z{x':T
h.init(data); 7\rz*
for(int i=0;i h.remove(); gsqlWfa
System.arraycopy(h.queue,1,data,0,data.length); nxKV7d@R
} cMsm[D{b
lSUEE0V%Q
private static class MaxHeap{ gb|C592R5C
/^G1wz2
void init(int[] data){ #O/ihRoaO
this.queue=new int[data.length+1]; EQ-r
for(int i=0;i queue[++size]=data; fDNiU"
fixUp(size); .v9#|d d+
} ow!utAF
} 200/
{k%*j 4
private int size=0; "6w-jT
y9{KBM%h
private int[] queue; TIbiw
)/1AF^ E
public int get() { mQhI"3!f
return queue[1]; HJo&snT3
} NBwxN
lRF04
public void remove() { 5f(yF
SortUtil.swap(queue,1,size--); (, /`*GC
fixDown(1); {Xb 6wQ"
} :3pJGMv(
file://fixdown lE=(6Q
private void fixDown(int k) { 7xTgG!>v
int j; ig5 d-A
while ((j = k << 1) <= size) { 9=O`?$y
if (j < size %26amp;%26amp; queue[j] j++; N DZ :`D
if (queue[k]>queue[j]) file://不用交换 +F.{:
break; T"xq^h1\
SortUtil.swap(queue,j,k); ?{[ISk)
k = j; V9&7K65-1
} dmI~$*
} YRa{6*M
private void fixUp(int k) { y.(Yh1
while (k > 1) { NF8'O
int j = k >> 1; W/DSj :
if (queue[j]>queue[k]) 3eT5~Lbs
break; z*n
SortUtil.swap(queue,j,k); :FB-GNd
k = j; tIn dve
} ;,2i1m0"
} dO]N&'P7
nwuH:6~"
} 4efIw<1_
(#I$4Px{
} ere h!
j3>0oe!
SortUtil： `#@#eZ
riw0w
package org.rut.util.algorithm; (=&z:-52V
WV5z~[
import org.rut.util.algorithm.support.BubbleSort; 1g_p`(
import org.rut.util.algorithm.support.HeapSort; 6d~[j<@2
import org.rut.util.algorithm.support.ImprovedMergeSort; TQ`s&8"P
import org.rut.util.algorithm.support.ImprovedQuickSort; )(b,v/:
import org.rut.util.algorithm.support.InsertSort; bd|ZhRsL
import org.rut.util.algorithm.support.MergeSort; oKyl2jg+,
import org.rut.util.algorithm.support.QuickSort; MpY/G%3
import org.rut.util.algorithm.support.SelectionSort; p+x}$&<|
import org.rut.util.algorithm.support.ShellSort; E~}@56ER}
hA=.${uIO
/** T{WJf-pI
* @author treeroot v7-z<'?s~
* @since 2006-2-2 m[aBHA^g
* @version 1.0 i ZU1w7Z
*/ 5>r2&72=
public class SortUtil { ?,XrZRF
public final static int INSERT = 1; Z$*m=]2
public final static int BUBBLE = 2; M=rH*w{^
public final static int SELECTION = 3; oS>VN<
public final static int SHELL = 4; Yt]Y(
public final static int QUICK = 5; ]mzghH:E
public final static int IMPROVED_QUICK = 6; %*bGW'Cw
public final static int MERGE = 7; k2-+3zx
public final static int IMPROVED_MERGE = 8; k'6x_ G
public final static int HEAP = 9; y':JUwUN
wXR7Ifrv
public static void sort(int[] data) { q"LE6?hs
sort(data, IMPROVED_QUICK); kR0/jEz C
} (e"\%p`
private static String[] name={ S7B\mv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" to9X2^
}; k,,Bf-?
yDapl(
private static Sort[] impl=new Sort[]{ :DG7Z
new InsertSort(), E!EENg
new BubbleSort(), MV.&GUez{
new SelectionSort(), 2#81oz&K
new ShellSort(), Zdfruzl&`
new QuickSort(), a&z$4!wQB
new ImprovedQuickSort(), mI>=S
new MergeSort(), <dWms`QcO
new ImprovedMergeSort(), L#k`>Qn2
new HeapSort() j&-<e7O=
}; ^ *1hz<
A$jf#,
public static String toString(int algorithm){ d-{1>\-_
return name[algorithm-1]; X..<U}e
} ]?*'[
0`QF:
public static void sort(int[] data, int algorithm) { &gdhq~4#
impl[algorithm-1].sort(data); ubs>(\`q"
} ZH)thd9^b
fR&x5Ika0
public static interface Sort { i%GNmD
public void sort(int[] data); Sa9p#OQ
} m;cgX#k5
=))VxuoN
public static void swap(int[] data, int i, int j) { XK{KFB-
int temp = data; aZ'(ar:
data = data[j]; HSj=g}r
data[j] = temp; cT|aQM@iW
} W`F?j-4
} Oj1B @QE