[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; P>Rqy
} {v/6|
int i1=l; / hdl
int i2=mid+1; <Py/uF|
for(int cur=l;cur<=r;cur++){ ew['9
if(i1==mid+1) e1}0f8%
data[cur]=temp[i2++]; mU>*NP(L
else if(i2>r) ]J]p:Y>NL
data[cur]=temp[i1++]; IH:Cm5MV
else if(temp[i1] data[cur]=temp[i1++]; X^^D[U
else r:Cid*~m
data[cur]=temp[i2++]; SntYi0,`
} wf$ JuHPt
} y~1php>2f1
?y@pRe$2
} ee` =B
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改进后的归并排序: HjR<4;2
tJ=zk3BN~
package org.rut.util.algorithm.support; SVz.d/3Y
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import org.rut.util.algorithm.SortUtil; ka[NYW{.
4;{CR. D
/** 9oz)E>K4f
* @author treeroot jK1! \j
* @since 2006-2-2 7J/3O[2
* @version 1.0 ~h+3WuOv
*/ j`lK}
public class ImprovedMergeSort implements SortUtil.Sort { nzDY!Y
Z`MQ+
private static final int THRESHOLD = 10; OPjh"Hv
-3Hq1
/* n_glYSV!
* (non-Javadoc) ]h@:Y]
* ~=*_I4,+r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7X>3WF
*/ *%sYajmD
public void sort(int[] data) { z"`?<A&u
int[] temp=new int[data.length]; j]^]p;An
mergeSort(data,temp,0,data.length-1); |05LHwb>
} a}\JA`5;)Z
XzsK^E0R
private void mergeSort(int[] data, int[] temp, int l, int r) { $i Tgv?.Q
int i, j, k; ;'}xD5]
int mid = (l + r) / 2; yD"sYT
if (l == r) 0g\&3EvD
return; =c'LG
if ((mid - l) >= THRESHOLD) XF6=xD
mergeSort(data, temp, l, mid); mH"`46
else 3WS %H17
insertSort(data, l, mid - l + 1); 50A_+f.7%
if ((r - mid) > THRESHOLD) LX'US-B.!
mergeSort(data, temp, mid + 1, r); \=~Ap#Mpc4
else :QNEA3Q
insertSort(data, mid + 1, r - mid); wd*Jq
~MX@-Ff
for (i = l; i <= mid; i++) { Ycwb1e#
temp = data; +FR"Gt$g
} Mtr~d
for (j = 1; j <= r - mid; j++) { 19_F\32
temp[r - j + 1] = data[j + mid]; bUNp>H>L
} |%}?*|-
int a = temp[l]; 4w,}1uNEf
int b = temp[r]; RWE%?`
for (i = l, j = r, k = l; k <= r; k++) { "7DPsPs
if (a < b) { jQhf)B
data[k] = temp[i++]; |j<'[gB\p
a = temp; Hw Is7
} else { Gmb57z&:
data[k] = temp[j--]; t +_G%tv
b = temp[j]; -h}J%UV
} {)M4h?.2
} }`(kX]][
} =|V3cM4'
shB(kb{{
/** 2%I:s6r
* @param data t9}XO M*
* @param l f W )
* @param i ?#'qY6 ^
*/ WBGYk);
private void insertSort(int[] data, int start, int len) { +J} 41
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E9i WGSE
} x9=lN^/4
} -:QyWw/d
} `#V"@Go
} *VUXw@
<KpQu%2(
堆排序： y.Py>GJJ1S
bu.36\78
package org.rut.util.algorithm.support; 4}CRM# W2
4R]|
import org.rut.util.algorithm.SortUtil; >h9U~#G=
tv0xfAV
/** g 0L 4
* @author treeroot UpITx]y?"m
* @since 2006-2-2 [|YMnV<B
* @version 1.0 gDv]n^&
*/ "~ /3
public class HeapSort implements SortUtil.Sort{ }fA3{Ro
C9z{8 ;
/* (non-Javadoc) {MS&t09Wh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >dM'UpN@
*/ %wO~\:F8
public void sort(int[] data) { cE3co(j
MaxHeap h=new MaxHeap(); 5IepVS(>?v
h.init(data); (7IF5g\
for(int i=0;i h.remove(); Q*wx6Pu8
System.arraycopy(h.queue,1,data,0,data.length); %bsdC0xM
} sk5\"jna
rk~/^(!
private static class MaxHeap{ 5*CwQJC<
4Vs;Y&t]
void init(int[] data){ y|aWUX/a
this.queue=new int[data.length+1]; yDKX,
for(int i=0;i queue[++size]=data; L=$P
fixUp(size); bY<"$);s
} %guot~S|
} YP7<j*s8
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private int size=0; x\=h^r#w
myo/}58Nv
private int[] queue; )-9/5Z0v
&`9lIVB,K
public int get() { fVkl-<?x
return queue[1]; ]mc,FlhU@
} B5cTzY.h-
,R)[$n
public void remove() { OJ 2M_q)e
SortUtil.swap(queue,1,size--); eD}Ga4
fixDown(1); 4ldN0_T5
} 6?~pWZ&k_
file://fixdown o]nQo?!
private void fixDown(int k) { C{Fo^-3
int j; xP*RH-<
while ((j = k << 1) <= size) { %6n;B|!
if (j < size %26amp;%26amp; queue[j] j++; pp:+SoyN
if (queue[k]>queue[j]) file://不用交换 1ID!rxE
break; `8Om*{xg
SortUtil.swap(queue,j,k); ~$cw]R58,9
k = j; /oI''O%M
} (T^aZuuS
} vL><Y.kOEs
private void fixUp(int k) { emHi=[!i
while (k > 1) { Pa.!:N-
int j = k >> 1; ^'h~#7s
if (queue[j]>queue[k]) >3ODqRu
break; >hXUq9;:
SortUtil.swap(queue,j,k); N&n{R8=^"
k = j; ILQg@Jl
} n"pADTaB
} +,%x&L&I
[W;14BD7
} %!q(zql
Yc %eTh
} v|hi;l@7E
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SortUtil： [;2v[&Po
T4UY%E!0
package org.rut.util.algorithm; Y}Ov`ZM!r
&8(2U-
import org.rut.util.algorithm.support.BubbleSort; N5s_o0K4TU
import org.rut.util.algorithm.support.HeapSort; G6 GXC`^+
import org.rut.util.algorithm.support.ImprovedMergeSort; c" l~=1Dr
import org.rut.util.algorithm.support.ImprovedQuickSort; U3Q'ZT
import org.rut.util.algorithm.support.InsertSort; 4, :D4WYWD
import org.rut.util.algorithm.support.MergeSort; 7fVVU+y
import org.rut.util.algorithm.support.QuickSort; Uq&|iB#mF
import org.rut.util.algorithm.support.SelectionSort; n;MoMGnPh,
import org.rut.util.algorithm.support.ShellSort; a5)+5
2q#$?qs_b
/** Ft]sTA+C
* @author treeroot %jkd}D
* @since 2006-2-2 t;*'p
* @version 1.0 `R^)<v*
*/ T}zi P
public class SortUtil { [-%oO
public final static int INSERT = 1; w#o<qrpHf
public final static int BUBBLE = 2; 0 cQf_o
public final static int SELECTION = 3; aw,8'N)
public final static int SHELL = 4; B1GSZUd^?0
public final static int QUICK = 5; )~J/,\
public final static int IMPROVED_QUICK = 6; vEb~QX0~
public final static int MERGE = 7; rg $71Ir
public final static int IMPROVED_MERGE = 8; <sPB|5Ak
public final static int HEAP = 9; Z?b. PC/
~E)I+$,
public static void sort(int[] data) { a{HvrWs?Q
sort(data, IMPROVED_QUICK); "XH]B
} TEYbB=.
private static String[] name={ gC'GZi^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2n@"|\uHD
}; o~~_>V)W
5?Bi+fg
private static Sort[] impl=new Sort[]{ {!,+C0
new InsertSort(), ='mqfGRi>
new BubbleSort(), k'{lo_
new SelectionSort(), h.c)+wz/%C
new ShellSort(), _x:K%1_[
new QuickSort(), ?=\h/C
new ImprovedQuickSort(), 0/%zXp&m
new MergeSort(), jHFdDw|N`
new ImprovedMergeSort(), "zqt'b0bW
new HeapSort() R; IB o
}; F|"NJ*o}
m1frN#3
public static String toString(int algorithm){ . E.OBn
return name[algorithm-1]; .Wr7?'D1M
} :>cJ[K?0
"c}bqoN
public static void sort(int[] data, int algorithm) { vzVl2
impl[algorithm-1].sort(data); 6h5*b8LxA
} *zmbo >{(
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public static interface Sort { D6 M:pIN*
public void sort(int[] data); f[X>?{q
} EswM#D9(4
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public static void swap(int[] data, int i, int j) { BKGwi2]Ry
int temp = data; ){6;o&CC:
data = data[j]; T$+}Srb
data[j] = temp; 'SuYNA)
} 1sgoT f%
} J${wU@_%