[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; w]b3,b
} .i[rd4MCK
int i1=l; ig(a28%
int i2=mid+1; hu (h'
for(int cur=l;cur<=r;cur++){ }J27Y;Zp9
if(i1==mid+1) 0 1U/{D6D
data[cur]=temp[i2++]; ^vXMX^*
else if(i2>r) hsIC5@s3
data[cur]=temp[i1++]; H!Gsu$C
else if(temp[i1] data[cur]=temp[i1++]; >e y.7YG
else QXZjsa_|
data[cur]=temp[i2++]; gBQK
} ~kUdHne(
} W]kh?+SZ
XQAdb"`
} }oHA@o5
M)td%<_
改进后的归并排序: iM;7V*u
bF:]MB^VK
package org.rut.util.algorithm.support; nN!/
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import org.rut.util.algorithm.SortUtil; 1"J\iwN3
LB}y,-vX>
/** @+LkGrDP
* @author treeroot `6:;*#jO,
* @since 2006-2-2 >%jQw.
* @version 1.0 x ;V7D5 q
*/ Lc ,te1
public class ImprovedMergeSort implements SortUtil.Sort { 6'6"Ogu%'
!e?;f=1+E
private static final int THRESHOLD = 10; s)Bmi
jEr/*kv
/* 'V";"Ei
* (non-Javadoc) m1DzUq;
* 5 _X|U*+5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ['%]tWT9
*/ rblEyCR
public void sort(int[] data) { L~N<<8?\
int[] temp=new int[data.length]; TCAtb('D
mergeSort(data,temp,0,data.length-1); Kn~f$1
} b e[KNrO
:G$f)NMK
private void mergeSort(int[] data, int[] temp, int l, int r) { kL;sA'I:S
int i, j, k; jt|e?1:vF
int mid = (l + r) / 2; bDI#'F
if (l == r) eqz#KN`n#
return; P_11N9C
if ((mid - l) >= THRESHOLD) vZj:\geV
mergeSort(data, temp, l, mid); .6Jo1$+
else dL%?k@R
insertSort(data, l, mid - l + 1); g.-{=kZ
if ((r - mid) > THRESHOLD) emp*j@9
mergeSort(data, temp, mid + 1, r); + v.I|c
else {fXD@lhi
insertSort(data, mid + 1, r - mid); l}-JtZ?[?
+4G]!tV6
for (i = l; i <= mid; i++) { X`kTbIZ|
temp = data; wi'CBfr'z
} o*OYZ/_L
for (j = 1; j <= r - mid; j++) { h3rdqx1
temp[r - j + 1] = data[j + mid]; 6Yw;@w\
} ;=goIsk{Q
int a = temp[l]; ETk4I"
int b = temp[r]; w"Gci~]bXU
for (i = l, j = r, k = l; k <= r; k++) { >Micc
if (a < b) { xa+=9=<AQ
data[k] = temp[i++]; e>`+Vk^Jc
a = temp; E,5XX;|
} else { e1$T%?(&[
data[k] = temp[j--]; Fj? Q4_
b = temp[j]; 6Y4sv5G
} J^tLKTB
} o^P/ -&T
} yhzC 9nTH
jWHv9XtW
/** ;&mefaFlWp
* @param data o6LeC*
* @param l eUMOV]h
* @param i ' S%?&4
*/ *?sdWRbu}l
private void insertSort(int[] data, int start, int len) { ]%AmX-U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3[mVPV
} ;S Re`
} vv0A5p8H
} >bQ'*!
} OV<'v%_&
MTm}qx@L
堆排序： VX+:k.}
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package org.rut.util.algorithm.support; \0gU)tVZ
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import org.rut.util.algorithm.SortUtil; )fPN6x/e
)1#J4
/** %UGXgYDz
* @author treeroot WC2sRv4]3
* @since 2006-2-2 sa8Q1i&%
* @version 1.0 b;kgP`%%
*/ g!/O)X3
public class HeapSort implements SortUtil.Sort{ #8xP,2&zf
lX g.`
/* (non-Javadoc) |HT5G=dw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) . W ~&d_n
*/ HLYog+?
public void sort(int[] data) { VsIDd}~C%
MaxHeap h=new MaxHeap(); &E&_Z6#
h.init(data); T#M_2qJ1=
for(int i=0;i h.remove(); 3MqyHOOv
System.arraycopy(h.queue,1,data,0,data.length); `MD%VHQ9U
} MS7rD%(,'
aK|],L
private static class MaxHeap{ },eV?eGj
wk+| }s
void init(int[] data){ :v$][jZ2
this.queue=new int[data.length+1]; O0`o0!=P
for(int i=0;i queue[++size]=data; ya`Z eQ-p
fixUp(size); fYxdG|>{u
} ;T-`~
} "`6pF8k
2!kb?
private int size=0; $?Dcp^
lf`" (:./
private int[] queue; c_~tCKAZ
wZe>}1t
public int get() { ]a=n(`l?
return queue[1]; s:/Wz39SY3
} lVptA3F
.DrGr:UW
public void remove() { O3/w@q Q
SortUtil.swap(queue,1,size--); Xd 5vNmQn
fixDown(1); KA/~q"N
} /mK."5-cm
file://fixdown 9z'(4U
private void fixDown(int k) { R+&{lc
int j; ?B{,%2+
while ((j = k << 1) <= size) { Y@l>4q")
if (j < size %26amp;%26amp; queue[j] j++; s=8$h:^9>
if (queue[k]>queue[j]) file://不用交换 [wkSY>Gu
break; q;Rhx"x>T
SortUtil.swap(queue,j,k); APUpqY
k = j; f^]^IXzXw.
} ET\>cxSp
} -n"7G%$M
private void fixUp(int k) { Wr6y w#
while (k > 1) { b O9PpOk+z
int j = k >> 1; {>h,@
if (queue[j]>queue[k]) O5v~wLx9e
break; Yu+;vjbK-
SortUtil.swap(queue,j,k); 6^QSV@N|
k = j; j V'~>
} 3kJ7aBiR<
} /St d6B*
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} p?,T%G+gqO
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} 5E!Wp[^
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SortUtil： }>yQ!3/i
2#_i_j
package org.rut.util.algorithm; Ih_=yk
+![\7
import org.rut.util.algorithm.support.BubbleSort; 8,&pX ga
import org.rut.util.algorithm.support.HeapSort; ;~"#aL50fe
import org.rut.util.algorithm.support.ImprovedMergeSort; Gj- *D7X5
import org.rut.util.algorithm.support.ImprovedQuickSort; f-5}`)`.+
import org.rut.util.algorithm.support.InsertSort; }kF*I@:g
import org.rut.util.algorithm.support.MergeSort; GmdS~Fhp
import org.rut.util.algorithm.support.QuickSort; "ZR^w5
import org.rut.util.algorithm.support.SelectionSort; O[5u6heNMr
import org.rut.util.algorithm.support.ShellSort; YPmgR]=6
df8aM<&m3
/** 1z-Q~m@@
* @author treeroot I,7n-G_'
* @since 2006-2-2 W~?mr!`
* @version 1.0 [J6q(}f
*/ NGAjajB
public class SortUtil { 0#!Z1:Y
public final static int INSERT = 1; s}Q*zy
public final static int BUBBLE = 2; gPY Cw?zQ
public final static int SELECTION = 3; te b/
public final static int SHELL = 4; 9._Osbp3P
public final static int QUICK = 5; %R-KkK<S
public final static int IMPROVED_QUICK = 6; a3B^RbDP&8
public final static int MERGE = 7; F(;95TB
public final static int IMPROVED_MERGE = 8; e)kVS}e?
public final static int HEAP = 9; 2@?\"kR"!
lk%W2N5
public static void sort(int[] data) { I7HP~v~
sort(data, IMPROVED_QUICK); Na>?1F"KHk
} \Z/#s;c,4
private static String[] name={ .WpvDDUK3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" la*c/*
}; _-nIy*',=
)kt,E}609
private static Sort[] impl=new Sort[]{ =Y<RG"]a&J
new InsertSort(), BLcsIyq
new BubbleSort(), t_{rKb,
new SelectionSort(), 4qmaL+Q
new ShellSort(), |s{[<;
new QuickSort(), PP!}w
new ImprovedQuickSort(), rEY5,'?YHv
new MergeSort(), c@)}zcw*
new ImprovedMergeSort(), 4<l&cP
new HeapSort() IWP[?U=
}; &J}w_BFww
+EP=uV9t
public static String toString(int algorithm){ 4kdQ h]
return name[algorithm-1]; {, zg
} FX:'38-fk
93fClF|@
public static void sort(int[] data, int algorithm) { i~;Yrc%AEX
impl[algorithm-1].sort(data); [y1 x`WOk9
} 4KT-U6zNx
1,(uRS#bk
public static interface Sort { g@B,0JRh
public void sort(int[] data); s5D<c'-
} 8VLD yX2-
=3<@{^Eg
public static void swap(int[] data, int i, int j) { M`gr*p
int temp = data; N cnL-k.
data = data[j]; h;`]rK;g
data[j] = temp; 4&/m>%r
} F]7$Y
} Ialbz\;F2%