[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; 'MgYSP<
} xlcL;e&^P
int i1=l; (b;Kl1Ql]
int i2=mid+1; C4aAPkcp2$
for(int cur=l;cur<=r;cur++){ "wy2u~
if(i1==mid+1) ~pT1,1
data[cur]=temp[i2++]; QHXA?nBX
else if(i2>r) d{J@A;da
data[cur]=temp[i1++]; m'zve%G
else if(temp[i1] data[cur]=temp[i1++]; [XE\2Qa8e
else "&:H }Jd
data[cur]=temp[i2++]; =&i#NSK
} l*.u rG
} KCIya[$*
Y&<]:)
} \RqH"HqD
W3zYE3DZf
改进后的归并排序: h! Bg}B~
eDsB.^|l
package org.rut.util.algorithm.support; B[3u,<opFU
jp;]dyU
import org.rut.util.algorithm.SortUtil; ?W>`skQ
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/** IeZ9 "o h
* @author treeroot A$M8w9
* @since 2006-2-2 OdbXna
* @version 1.0 ff;~k?L
*/ P;`Awp?
public class ImprovedMergeSort implements SortUtil.Sort { jF-:e;-
&,P; 7R
private static final int THRESHOLD = 10; a&2UDl%K
[vY#9W"!
/* ]Cs=EZr
* (non-Javadoc) WG&! VK
* 9W0*|!tQ,+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dS8ydG2
*/ g< xE}[gF
public void sort(int[] data) { BRy3D\}
int[] temp=new int[data.length]; k;B[wEW@
mergeSort(data,temp,0,data.length-1); ]$uC~b
} + ZKU2N*
eBH:_Ls_-^
private void mergeSort(int[] data, int[] temp, int l, int r) { 2!6E~<~HC
int i, j, k; d>?C?F
int mid = (l + r) / 2; 9Fy'L#%
if (l == r) le' Kp V
return; {+m8^-T
if ((mid - l) >= THRESHOLD) ,CI-IR2
mergeSort(data, temp, l, mid); a>6D3n W
else Q6HghG
insertSort(data, l, mid - l + 1); A%2B3@1'q
if ((r - mid) > THRESHOLD) =w* 8
mergeSort(data, temp, mid + 1, r); =;4K5l{c
else 1c{m rsB
insertSort(data, mid + 1, r - mid); }N}Js*
2-DG6\QX|
for (i = l; i <= mid; i++) { U)xebU.!S
temp = data; }hsNsQ
} DZ @B9<Zz{
for (j = 1; j <= r - mid; j++) { dk^jv +
temp[r - j + 1] = data[j + mid]; ] s^7c
} <(@Z#%O9)
int a = temp[l]; suzK)rJ9i
int b = temp[r]; Wsgp#W+
for (i = l, j = r, k = l; k <= r; k++) { Zf1 uK(6X
if (a < b) { *;)O'|
data[k] = temp[i++]; 3"zPG~fY{
a = temp; a{L&RRJ
} else { &XV9_{Hm
data[k] = temp[j--]; I-}ms
b = temp[j]; U3C"o|
} QJj='+R>
} G pI4QzR
} cxQAp
B~^*@5#0|
/** }S8aR:'
* @param data B$6KI
* @param l E}KGZSj
* @param i $#-rOi /
*/ {:3\Ms#
private void insertSort(int[] data, int start, int len) { HAL\j5i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &TY74w*
} *RxJ8.G
} 1a/C(4_k
} 2Mk;r*FT
} 2F>Y{3&
<T?-A}0uO
堆排序： 8^^ 1h
!(7m/R
package org.rut.util.algorithm.support; kc0MQ TJU
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import org.rut.util.algorithm.SortUtil; `u}_O(A1pA
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/** :o'|%JE
* @author treeroot wgIm{;T[u
* @since 2006-2-2 #Lpw8b6
* @version 1.0 [Q{\Ik
*/ ?)J/uU2w
public class HeapSort implements SortUtil.Sort{ .Sn{a}XP4
u4IK7[=
/* (non-Javadoc) $K!Jm7O\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QmjE\TcK/
*/ ;&n iZKoe
public void sort(int[] data) { y%ij)vQY
MaxHeap h=new MaxHeap(); jhf# gdz%
h.init(data); L /:^;j`c
for(int i=0;i h.remove(); \#(1IC`as
System.arraycopy(h.queue,1,data,0,data.length); SGSyO0O
} 0uIY6e0E
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private static class MaxHeap{ (_|*&au J
haBmwq(f
void init(int[] data){ r&m49N,d
this.queue=new int[data.length+1]; _Iminet
for(int i=0;i queue[++size]=data; :`NZD
fixUp(size); Nd]F 33|X
} g3c<c S^l
} _\KFMe=PV
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private int size=0; 5"@>>"3U
d_d&su E
private int[] queue; =TDKU
}< H>9iJ:
public int get() { jQ;/=9
return queue[1]; bwzx_F/
} &muBSQ-
ed`"xm
public void remove() { L&DjNu`!9
SortUtil.swap(queue,1,size--); w.w{L=p:<"
fixDown(1); x)*Lu">
} pdRM%ug
file://fixdown ?/OF=C#
private void fixDown(int k) { ~*7$aj
int j; E+i*u
while ((j = k << 1) <= size) { o3dqsQE%
if (j < size %26amp;%26amp; queue[j] j++; )][U6e
if (queue[k]>queue[j]) file://不用交换 Ny2 Z <TW
break; _i {Y0d+
SortUtil.swap(queue,j,k); zawu(3?~)5
k = j; Rpgg :
} z^U+oG
} +Q u.86dH
private void fixUp(int k) { M i& ;1!bg
while (k > 1) { LAlwQ^v|
int j = k >> 1; >Xk42zvqn
if (queue[j]>queue[k]) v']_)
break; 6&os`!
SortUtil.swap(queue,j,k); {lWVH
k = j; m;~}}~&vQ
} GMJ4v S
} 0TmEa59P
$KYGQP
} WVRIq'
>t3_]n1e
} V?j,$LixY
)vS0Au^C~
SortUtil： RFL* qd4
)]j3-#
package org.rut.util.algorithm; (DO'iCxlNh
UsyNn39
import org.rut.util.algorithm.support.BubbleSort; G<e+sDQ2
import org.rut.util.algorithm.support.HeapSort; q13fmK(n-5
import org.rut.util.algorithm.support.ImprovedMergeSort; -*' ?D@l
import org.rut.util.algorithm.support.ImprovedQuickSort; %`C*8fc&
import org.rut.util.algorithm.support.InsertSort; BQ0?B*yqd
import org.rut.util.algorithm.support.MergeSort; >8_y-74
import org.rut.util.algorithm.support.QuickSort; 7A\`
import org.rut.util.algorithm.support.SelectionSort; o6MFMA+vi
import org.rut.util.algorithm.support.ShellSort; 3W7^,ir
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/** OP1`!P y
* @author treeroot KAClV%jP
* @since 2006-2-2 qR'FbI
* @version 1.0 !b+4[xky
*/ p75o1RU
public class SortUtil { LZn'+{\`
public final static int INSERT = 1; aDdGhB
public final static int BUBBLE = 2; \Ip)Lm0
public final static int SELECTION = 3; W_2;j)i
public final static int SHELL = 4; Ab ,^y
public final static int QUICK = 5; nZbI}kcm
public final static int IMPROVED_QUICK = 6; Y${'
public final static int MERGE = 7; :EV.nD7
public final static int IMPROVED_MERGE = 8; $XhMI;h
public final static int HEAP = 9; 8X,6U_>#a
P`lv_oV
public static void sort(int[] data) { $(9QnH1KY
sort(data, IMPROVED_QUICK); .2fvRN92
} hN2A%ds*(j
private static String[] name={ A4tk</A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pX_#Y)5
}; @wcF#?J
^xa, r#N:V
private static Sort[] impl=new Sort[]{ @q'kKVJs
new InsertSort(), syR"p,3EC
new BubbleSort(), uI-T]N:W8x
new SelectionSort(), P+j=]Yg
new ShellSort(), 9~Dg<wQ
new QuickSort(), z?\it(
new ImprovedQuickSort(), KQPu9f9
new MergeSort(), lAU99(GXV
new ImprovedMergeSort(), .rtA sbp.!
new HeapSort() L~6%Fi&n4
}; BTkx}KK
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public static String toString(int algorithm){ i=EOk}R
return name[algorithm-1]; _Q5mPBO
} 1(o\GI3:
LDjtkD.r
public static void sort(int[] data, int algorithm) { ",b:rgpRp
impl[algorithm-1].sort(data); Dx-P]j)4x
} x]c8?H9,&
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public static interface Sort { X`D2w:
public void sort(int[] data); h-P|O6@Ki
} V\Cl""`XN
KyyRHf5
public static void swap(int[] data, int i, int j) { :oIBJ u%/
int temp = data; X+;[Gc}(W
data = data[j]; /]`@.mZ9:
data[j] = temp; U+!RIF[Je
} "0CFvN'4
} <K[y~9u