[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(u6J#2
} ZbZAx:L
int i1=l; ;y?D1o^r8W
int i2=mid+1; `>`K7-H
for(int cur=l;cur<=r;cur++){ .236d^l
if(i1==mid+1) 4'}_qAT
data[cur]=temp[i2++]; v$.JmL0^J
else if(i2>r) "lv:hz
data[cur]=temp[i1++]; 1OiZNuI:E
else if(temp[i1] data[cur]=temp[i1++]; j{7ilo(i
else )CwMR'LV
data[cur]=temp[i2++]; r2E>sHw
} 6*(h9!_T1
} vUo.BA#;.b
v2Qc}o
} a.Rp#}f
1,%#O;ya
改进后的归并排序: ^H\-3/si*
aowPji$H
package org.rut.util.algorithm.support; W[1f]w3
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import org.rut.util.algorithm.SortUtil; Dj,+t+|
&G7)s%q
/** w{:Oa7_A
* @author treeroot XoH[MJC
* @since 2006-2-2 0w'y#U)&8
* @version 1.0 },n,P&M\`
*/ _ RT"1"r
public class ImprovedMergeSort implements SortUtil.Sort { RB% fA%d
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private static final int THRESHOLD = 10; RIVL 0Ig
DiYJlD&
/* t_zY0{|P
* (non-Javadoc) ! 6p)t[s
* 7&RJDa:a7T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PPj6QJ]R0
*/ cvs"WX3
public void sort(int[] data) { ~-`BSR
int[] temp=new int[data.length]; |4p<T!T
mergeSort(data,temp,0,data.length-1); )/+eLRN5G
} @KXz4PU
08K.\3
private void mergeSort(int[] data, int[] temp, int l, int r) { RBK>Lws6
int i, j, k; 3"^)bGe
int mid = (l + r) / 2; `!Ge"JB6
if (l == r) . tH35/r
return; k`2B9,z
if ((mid - l) >= THRESHOLD) rmg";(I
mergeSort(data, temp, l, mid); |S>J<]H p
else cO=UswIkwO
insertSort(data, l, mid - l + 1); =-Q
if ((r - mid) > THRESHOLD) :#W>SO
mergeSort(data, temp, mid + 1, r); Hs4zJk
else P^_d$
insertSort(data, mid + 1, r - mid); Xb+if
q/w6sQx$
for (i = l; i <= mid; i++) { T`w};]z^d2
temp = data; YCB 3
} wsb=[$C
for (j = 1; j <= r - mid; j++) { [y=$2
temp[r - j + 1] = data[j + mid]; MMxoKL
} YnO1Lf@
int a = temp[l]; wJeqa
int b = temp[r]; U+RCQTo
for (i = l, j = r, k = l; k <= r; k++) { R/Dy05nloe
if (a < b) { jKCqH$
data[k] = temp[i++]; a9@l8{)RX
a = temp; ".Deu|>
} else { Z_OqXo=
data[k] = temp[j--]; 9h,yb4jPP
b = temp[j]; v4k=NH+w
} :DX/r
} C1Pt3
} RP@idz
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/** 8#Z\}gGz
* @param data %dk$K!5D0
* @param l "za*$DU
* @param i P#2TM
*/ $OFFH[_z
private void insertSort(int[] data, int start, int len) { XUqE5[O%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s<r.+zqW
} o%~K4 M".
} kDpZnXP
} ^%*{:0'
} 73sAZa|
@qhg[= @
堆排序： LN6JH!
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package org.rut.util.algorithm.support; ://|f
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import org.rut.util.algorithm.SortUtil; (27F
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/** 85@6uBh
* @author treeroot 8DS5<
* @since 2006-2-2 = cI\OsV&?
* @version 1.0 Y`O}]*{>8R
*/ Y)j,(9
public class HeapSort implements SortUtil.Sort{ 5$"[gdt)T
%"KWjwp
/* (non-Javadoc) l-h7ksRs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "RJk7]p`*
*/ ,cO)Sxj
public void sort(int[] data) { $ p1EqVu
MaxHeap h=new MaxHeap(); rgZrE;*;
h.init(data); @Kb|
for(int i=0;i h.remove(); ?L#SnnE
System.arraycopy(h.queue,1,data,0,data.length); c{4nW|/W
} F=T.*-oS3
eg~^wi
private static class MaxHeap{ q}A3"$-F
+q=jB-eIx
void init(int[] data){ 0!'M#'m
this.queue=new int[data.length+1]; 7/OOq=z
for(int i=0;i queue[++size]=data; 3]]6z K^i
fixUp(size); !RUo:b+
} \-iUuHP
} cp?P@-
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private int size=0; p*&LEjaVM4
:ktX7p~
private int[] queue; !/(}meZj
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public int get() { eWk2YP!
return queue[1]; x2&!PpM
} xY'YbHFz
leYmVFE
public void remove() { nT.2jk+
SortUtil.swap(queue,1,size--); 'nDT.i
fixDown(1); @k #y-/~?
} oJu4vGy0
file://fixdown r~Ubgd ]U
private void fixDown(int k) { rMFZ#38d
int j; F5Q. Vh
while ((j = k << 1) <= size) { <fxjj
if (j < size %26amp;%26amp; queue[j] j++; 2?nyPqT3AM
if (queue[k]>queue[j]) file://不用交换 :@8.t,|
break; ! tPK"k
SortUtil.swap(queue,j,k); ZXDMbMD
k = j; COL8YY
} l3|>*szX
} MmX[xk
private void fixUp(int k) { R]sjG<
while (k > 1) { GQ)cUrXQz
int j = k >> 1; m)RxV@
if (queue[j]>queue[k]) v;qL?_:=c
break; vHe.+XY
SortUtil.swap(queue,j,k); F"#*8P
k = j; WIlS^?5I<
} J& SuUh<
} z}N^`_ *
%7wzGtM]ps
} k#+^=F^)I
cCKda3v!O
} R#bV/7Ol
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SortUtil： 61wG:
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package org.rut.util.algorithm; m/B9)JzY
ZS>/ 5
import org.rut.util.algorithm.support.BubbleSort; n?fC_dy
import org.rut.util.algorithm.support.HeapSort; H.~+{jTr
import org.rut.util.algorithm.support.ImprovedMergeSort; rtOW-cz
import org.rut.util.algorithm.support.ImprovedQuickSort; p 8Hv7*
import org.rut.util.algorithm.support.InsertSort; Y tj>U
import org.rut.util.algorithm.support.MergeSort; ] r+I D
import org.rut.util.algorithm.support.QuickSort; 2xBGs9_Y
import org.rut.util.algorithm.support.SelectionSort; yXl.Gq>]{
import org.rut.util.algorithm.support.ShellSort; s/^=WV
DYk->)
/** /38Pp%
* @author treeroot F qyJ*W\1
* @since 2006-2-2 dsoRPX']=
* @version 1.0 'N/%SRk
*/ JkEQ@x
public class SortUtil { -;.fU44O[#
public final static int INSERT = 1; 9.}3RAB(cv
public final static int BUBBLE = 2; <sG>[\i
public final static int SELECTION = 3; =n?@My?;
public final static int SHELL = 4; m,_oX1h
public final static int QUICK = 5; L| qY
public final static int IMPROVED_QUICK = 6; 1@@]h!>k:
public final static int MERGE = 7; ~2;y4%K
public final static int IMPROVED_MERGE = 8; ?&^l8gE
public final static int HEAP = 9; LYKm2C*d
?Ir6*ZyY
public static void sort(int[] data) { ~%q e,
sort(data, IMPROVED_QUICK); Jq@LZ2^
} .qP zd(<T7
private static String[] name={ ht!:e>z&4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" goWt!,&f
}; .SFwjriZ
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private static Sort[] impl=new Sort[]{ t)b>f~
new InsertSort(), :P'5_YSi
new BubbleSort(), IiU|@f~k
new SelectionSort(), $S=OmdgR
new ShellSort(), cv&hT.1
new QuickSort(), z`6KX93
new ImprovedQuickSort(), 05DtU!3O
new MergeSort(), 7P(:!ce4-
new ImprovedMergeSort(), 1O{67Pf
new HeapSort() bJvRQrj*3
}; cZi&L p
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public static String toString(int algorithm){ N4FG_N
return name[algorithm-1]; 'a9.JS[pj
} u(qpdG||7
S+ x[1#r
public static void sort(int[] data, int algorithm) { U_04QwhK7
impl[algorithm-1].sort(data); A]slssE+
} N* QI>kzU
#`EMK
public static interface Sort { L>*|T[~
public void sort(int[] data); -#hl&^u$
} d@~)Wlje
#-8/|_*
public static void swap(int[] data, int i, int j) { zoXF"Nz
int temp = data; 3?<vnpN=5d
data = data[j]; {K}+$jzGVt
data[j] = temp; }\*|b@)]
} ]z$<6+G
} +d.Bf