[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; ZR@PqS+O/
} N.|uPq$R
int i1=l; DeGcS1_?
int i2=mid+1; hV[=
for(int cur=l;cur<=r;cur++){ "[wP1n!G
if(i1==mid+1) "yc@_+"\+
data[cur]=temp[i2++]; o7t#yw3
else if(i2>r) }XIUz|
data[cur]=temp[i1++]; "78BApjWT6
else if(temp[i1] data[cur]=temp[i1++]; rWxQ;bb#
else 75RQ\_zDu
data[cur]=temp[i2++]; SD=9fh0l
} w$[ck=
} aDVBi: _
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} jt4c*0z
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改进后的归并排序: IjnO2X
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package org.rut.util.algorithm.support; F!~oJ
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import org.rut.util.algorithm.SortUtil; _.K<#S
av4g/7=
/** ip2BvN&
* @author treeroot {igVuZ(>en
* @since 2006-2-2 E:S (v
* @version 1.0 kc}&\y
*/ g;t>jgX
public class ImprovedMergeSort implements SortUtil.Sort { G|.5.FK^
1g bqHxWI
private static final int THRESHOLD = 10; -+Ab[
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/* Sz'JOBp
* (non-Javadoc) ad'C&^o5
* t+m ug
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -KFozwr5/
*/ `=VN\W^&
public void sort(int[] data) { m{C
int[] temp=new int[data.length]; Y+ea
mergeSort(data,temp,0,data.length-1); 9ZXEy }q57
} 3ew`e"s
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private void mergeSort(int[] data, int[] temp, int l, int r) { R[{s\
int i, j, k; PxiJ R[a
int mid = (l + r) / 2; <t)D`nY\
if (l == r) )|CF)T-
return; kSH|+K\M4
if ((mid - l) >= THRESHOLD) !(-S?*64l
mergeSort(data, temp, l, mid); :igURr
else V j"B/@
insertSort(data, l, mid - l + 1); j SXVLyz
if ((r - mid) > THRESHOLD) y%=t((.Z
mergeSort(data, temp, mid + 1, r); Cz]NSG5
else )%=oJ!)
insertSort(data, mid + 1, r - mid); Q R<q[@)F
4l`"P~=2<
for (i = l; i <= mid; i++) { :;u?TFCRx
temp = data; 89X`U)Ws
} "L~qsFL
for (j = 1; j <= r - mid; j++) { sQ>L3F;A`
temp[r - j + 1] = data[j + mid]; ~(/OB w
} S6bW?8`
int a = temp[l]; ?Z[`sm
int b = temp[r]; >{huaN B
for (i = l, j = r, k = l; k <= r; k++) { ew{(@p+$
if (a < b) { Qg' {RAV8
data[k] = temp[i++]; (2fWJ%7VG
a = temp; Rw#4 |&
} else { c2d=dGP>~f
data[k] = temp[j--]; !e0~|8
b = temp[j]; ibIo1i//[
} (!^;ar^
} AQa;D2B$
} d-sK{ZC"y
T`gR&n<D
/** XlHt(d0h
* @param data 1T@#gE["Ic
* @param l o2#_CdU
* @param i ^-GzWT
*/ M5>cYVG
private void insertSort(int[] data, int start, int len) { t?<pyw $
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7"0l>0 \
} k x26nDT(
} Y}Gf%Xi,
} YdNmnB%J
} lay)I11->
,2?Sua/LD
堆排序： )S2GPn7
7U_OUUg
package org.rut.util.algorithm.support; |SfmQ;
9et%Hn.K'
import org.rut.util.algorithm.SortUtil; N5\]VCX
@XRN#_{
/** iR(jCD?) Y
* @author treeroot J52- qR/
* @since 2006-2-2 n~|sMpd,M1
* @version 1.0 01/yog
*/ _BP!{~&;
public class HeapSort implements SortUtil.Sort{ m"y_@Jk
L?slIGp%-
/* (non-Javadoc) 0k\BE\PQk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1L\\](^ 3
*/ #2\ 0#HN
public void sort(int[] data) { xpjv@P
MaxHeap h=new MaxHeap(); Q5~Y;0'
h.init(data); D?:AHj%gW
for(int i=0;i h.remove(); ?<"H Io
System.arraycopy(h.queue,1,data,0,data.length); s2rwFj8 |
} wz{]CQ7"
wW?/`>@
private static class MaxHeap{ vjz*B$
Gl@}b\TB
void init(int[] data){ JNZ O7s
this.queue=new int[data.length+1]; mM6X0aM
for(int i=0;i queue[++size]=data; i{+W62k*
fixUp(size); Sdn4y(&TP
} Td"_To@jd
} 7_*k<W7|
]> dCt<
private int size=0; "ke>O'
g=5vnY
private int[] queue; XV|u!'Ey
3+>;$
public int get() { %SHgXd#X
return queue[1]; v62M8r,Y
} dNg5#?mzT5
?@uyqi~:U
public void remove() { C0> Z<z
SortUtil.swap(queue,1,size--); 'l7ey3B%
fixDown(1); 4gkaCk{]
} U.,_zEbx,
file://fixdown ^vA"3Ixb!
private void fixDown(int k) { $>csm
int j; }> pNf
while ((j = k << 1) <= size) { lujUEHzp
if (j < size %26amp;%26amp; queue[j] j++; 7j22KQ|EX^
if (queue[k]>queue[j]) file://不用交换 Z\9DtvV
break; gfY1:0
SortUtil.swap(queue,j,k); BhcTPQsW
k = j; MJDW-KL-
} 44p?x8(z*
} 8,^2'dK34
private void fixUp(int k) { MaS"V`NI
while (k > 1) { 8,DY0PGP
int j = k >> 1; 9J $"Qt5;6
if (queue[j]>queue[k]) (0W)Jd[
break; 9yrSCDu00
SortUtil.swap(queue,j,k); oZCjci-
k = j; xP61^*-2
} lcqpwSk
} _q7mYc
dbG5Cf#K\
} fDU_eyt/Z'
;?K>dWf3f
} }S,KUH.
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SortUtil： zlhHSyK
nQ5N\RAZ
package org.rut.util.algorithm; z 7 s&7)a
J%mtlA
import org.rut.util.algorithm.support.BubbleSort; C1ZuDL)e
import org.rut.util.algorithm.support.HeapSort; o NqIrYH'
import org.rut.util.algorithm.support.ImprovedMergeSort; ]?3-;D.eG
import org.rut.util.algorithm.support.ImprovedQuickSort; J'H}e F`
import org.rut.util.algorithm.support.InsertSort; n&N>$c,T27
import org.rut.util.algorithm.support.MergeSort; k`u.:C&
import org.rut.util.algorithm.support.QuickSort; ObyF~j}j
import org.rut.util.algorithm.support.SelectionSort; ["65\GI?
import org.rut.util.algorithm.support.ShellSort; DbIn3/WNe
'] $mt
/** FIEA'kUy
* @author treeroot OKO+(>AQ
* @since 2006-2-2 |K,[[D<R
* @version 1.0 .s8u?1b
*/ u#^~([I
public class SortUtil { aSVR+of
public final static int INSERT = 1; j+6`nN7L
public final static int BUBBLE = 2; pHKGK7 S-
public final static int SELECTION = 3; 8`GN8F
public final static int SHELL = 4; &RL j^A!
public final static int QUICK = 5; NB=!1;^J
public final static int IMPROVED_QUICK = 6; 6 #m:=
public final static int MERGE = 7; T_NN.Ol
public final static int IMPROVED_MERGE = 8; qvN`46c
public final static int HEAP = 9; aWTvowA
PC55A1(T
public static void sort(int[] data) { i~sW_f+
sort(data, IMPROVED_QUICK); vZJu=t
} 1 LUvs~Qu
private static String[] name={ *ud/'HR8]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t8_i[Hw6D
}; )~LqBh
>9i%Yuy](
private static Sort[] impl=new Sort[]{ l/6$BPU`
new InsertSort(), t[=teB v<
new BubbleSort(), ,E3Ze*(U
new SelectionSort(), ^EFVjGM
new ShellSort(), fB"It~ p
new QuickSort(), <]wQ;14;H
new ImprovedQuickSort(), FesUE_L2$
new MergeSort(), O;CC(
new ImprovedMergeSort(), 1}XESAX;0
new HeapSort() u|EHe"V"
}; 25wvB@0&
Jnl#d0) -
public static String toString(int algorithm){ &wea]./B
return name[algorithm-1]; Zg;%$ kSQ
} yD:}&!\}
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public static void sort(int[] data, int algorithm) { ^nGKuW7\
impl[algorithm-1].sort(data); Z.E@aml\
} =?oYEO7
3`U^sr:[%
public static interface Sort { m#a1N
public void sort(int[] data); =}wqo6Bn|
} 8Luw<Q
,WgEl4
public static void swap(int[] data, int i, int j) { ]GH_;
int temp = data; *h4x`luJ
data = data[j]; RM6*c .
data[j] = temp; _sX@BE
} /pYp,ak
} D\-D~G]x